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1. Demographic histories and genetic diversity across pinnipeds are shaped by human exploitation, ecology and life-history

Author: M. A. Stoffel, E. Humble, A. J. Paijmans, K. Acevedo-Whitehouse, B. L. Chilvers, B. Dickerson, F. Galimberti, N. J. Gemmell, S. D. Goldsworthy, H. J. Nichols, O. Krüger, S. Negro, A. Osborne, T. Pastor, B. C. Robertson, S. Sanvito, J. K. Schultz, A. B. A. Shafer, J. B. W. Wolf, and J. I. Hoffman
Subjects: Science
Abstract: Historical hunting has caused documented declines in pinnipeds, but the extent to which hunting caused genetic bottlenecks among species was unknown. Here, the authors show evidence of severe bottlenecks in several pinniped species, particularly those that breed on land.
Published: 2018
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2. Search for hep solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory

Author: C. E. Okada, Ilan Levine, David A. Sinclair, D. Chauhan, J. Wendland, J. F. Wilkerson, B. Beltran, F. B. Descamps, Jocelyn Monroe, M. H. Schwendener, N. Gagnon, M. Jerkins, T. Sonley, F. Zhang, N. S. Oblath, G. D. Orebi Gann, H. Deng, B. Aharmim, J. R. Leslie, L. C. Stonehill, R. W. Ollerhead, J. Law, A. L. Hallin, B. T. Cleveland, B. C. Robertson, E. Blucher, Bei Cai, Ryuta Hazama, G. Doucas, K. Boudjemline, N. Tolich, M. Huang, H. Wan Chan Tseung, S. Habib, S. Majerus, Yuen-Dat Chan, K. Graham, T. Kutter, T. J. Winchester, Alain Bellerive, D. L. Wark, M. L. Miller, J. Heise, S. M. Oser, M. Bergevin, L. L. Kormos, R. D. Martin, Andrew Hime, N. McCauley, P. Jagam, S. R. Elliott, G. T. Ewan, C. Kraus, A. Krüger, Keith Rielage, R. G. H. Robertson, S. D. Reitzner, S. N. Ahmed, M. Kos, J. C. Loach, O. Simard, R. Van Berg, P. L. Drouin, K. Gilje, R. L. Hahn, I. Lawson, R. J. Ford, Monica Dunford, C. J. Virtue, E. W. Beier, A. J. Noble, J. Maneira, A. W. P. Poon, J. Caravaca, F. Fleurot, B. L. Wall, A. E. Anthony, Christopher C. M. Kyba, P. J. Doe, G. Prior, N. West, W. J. Heintzelman, Hal Evans, S. J. M. Peeters, C. Howard, J. Farine, H. M. O'Keeffe, K. T. Lesko, S. D. Biller, R. A. Ott, Bernie G. Nickel, P. J. Harvey, Jochen Klein, K. J. Keeter, E. Guillian, H. B. Mak, Minfang Yeh, G. Tešić, N. A. Jelley, S. McGee, J. Tm. Goon, N. Barros, A. B. McDonald, E. D. Hallman, R. MacLellan, T. Tsui, S. R. Seibert, Min Chen, C. B. Krauss, B. A. VanDevender, P. Skensved, D. Waller, B. Jamieson, R. Bonventre, James R. Wilson, B. J. Land, X. Dai, J. A. Secrest, J. A. Detwiler, G. A. Cox, R. Lange, Benjamin Monreal, A. Mastbaum, H. Fergani, R. L. Helmer, Kai Zuber, A. Wright, M. G. Boulay, A. LaTorre, E. J. Callaghan, K. Labe, and Joseph A. Formaggio
Subjects: Physics, Standard solar model, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Supernova, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Neutrino, 010306 general physics, Nuclear Experiment
Abstract: A search has been performed for neutrinos from two sources, the $hep$ reaction in the solar $pp$ fusion chain and the $��_e$ component of the diffuse supernova neutrino background (DSNB), using the full dataset of the Sudbury Neutrino Observatory with a total exposure of 2.47 kton-years after fiducialization. The $hep$ search is performed using both a single-bin counting analysis and a likelihood fit. We find a best-fit flux that is compatible with solar model predictions while remaining consistent with zero flux, and set a one-sided upper limit of $��_{hep} < 30\times10^{3}~\mathrm{cm}^{-2}~\mathrm{s}^{-1}$ [90% credible interval (CI)]. No events are observed in the DSNB search region, and we set an improved upper bound on the $��_e$ component of the DSNB flux of $��^\mathrm{DSNB}_{��_e} < 19~\textrm{cm}^{-2}~\textrm{s}^{-1}$ (90% CI) in the energy range $22.9 < E_��< 36.9$~MeV., 11 pages, 6 figures
Published: 2020

3. Contemporary effective population size and predicted maintenance of genetic diversity in the endangered kea (Nestor notabilis)

Author: N. Dussex and B. C. Robertson
Abstract: Population size and the potential for maintenance of genetic diversity are critical information for the monitoring of species of conservation concern. However, direct estimates of population size are not always feasible, making indirect genetic approaches a valuable alternative. We estimated contemporary effective population size (Ne) in the endangered kea (Nestor notabilis) using three different methods. We then inferred the census size (NC) using published Ne/NC ratios and modelled the future maintenance of genetic diversity assuming a number of demographic parameters. Short-term Ne was small with a range-wide Ne NC was within the range of the current estimate (c. 1000–5000). Forward simulations showed low probability of retaining 90% of rare alleles without immigration. However, the probability of maintaining genetic diversity was high with immigration, juvenile survival of ≥ 30%, and an initial sex ratio of c. 0.5–0.6. Despite the low Ne in kea, predator control and/or artificial immigration might be sufficient to maintain the present genetic diversity.
Published: 2017
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4. Neutral current and day night measurements from the pure D2O phase of SNO

Author: B. C. Robertson, J. R. Leslie, M. Dunford, Eric B. Norman, J. B. Wilhelmy, T. Kutter, J. Manor, J. Farine, S. D. Biller, C. W. Nally, T. V. Bullard, A. S. Hamer, D. R. Grant, Guthrie Miller, S. J. Brice, James R. Wilson, E. W. Beier, P. J. Harvey, J. Cameron, C. E. Okada, J. F. Wilkerson, E. D. Hallman, X. Chen, W. J. Heintzelman, S. R. Elliott, R. G. Stokstad, David A. Sinclair, J. A. Formaggio, P. Jagam, Reda Tafirout, Christopher C. M. Kyba, M. W. Smith, C. J. Virtue, Ilan Levine, H. B. Mak, R. G. Van de Water, N. Starinsky, G. Doucas, P. Skensved, G. T. Ewan, K. K. Schaffer, G. A. Cox, K. Kazkaz, M. M. Fowler, F. Dalnoki-Veress, M. G. Bowler, C. K. Hargrove, K. Graham, S. M. Oser, P. T. Keener, S. S.E. Rosendahl, S. Majerus, John L. Orrell, Hal Evans, W. Frati, S. Luoma, B. T. Cleveland, W. B. Handler, D. L. Wark, K. T. Lesko, N. Tagg, E. D. Earle, N. Gagnon, Y.D. Chan, K. M. Heeger, A. Hime, Mark Guy Boulay, X. Dai, J. J. Simpson, R. L. Hahn, R. Hazama, Minfang Yeh, J. A. Dunmore, N. A. Jelley, K. Frame, A. L. Hallin, M. Howe, J. M. Wouters, Peter Wittich, A. B. McDonald, N. McCauley, A. D. Marino, R. Van Berg, H. Fergani, M. L. Chen, I. Lawson, A. J. Noble, Jochen Klein, V. L. Rusu, J. Maneira, A. W. P. Poon, F. A. Duncan, R. G. H. Robertson, M. R. Dragowsky, T. Spreitzer, T.J. Bowles, G. McGregor, Chris Waltham, L. C. Stonehill, R. L. Helmer, M. H. Schwendener, J. Law, C. J. Sims, J. Heise, C. A. Duba, N. West, and P. J. Doe
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, Solar neutrino, Atomic and Molecular Physics, and Optics, Massless particle, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Nuclear Experiment, Charged current, Lepton
Abstract: The Sudbury Neutrino Observatory is a 1000 T D 2 O Cerenkov detector that is sensitive to 8 B solar neutrinos. The energy, radius, and direction with respect to the sun is measured for each neutrino event; these distributions are used to separately determine the rates of the charged current, neutral current and electron scattering reactions of neutrinos on deuterium. Assuming an undistorted 8 B spectrum, the ν e component of the 8 B solar flux is φ e = 1.76 +0.05 −0.05 (stat.) +0.09 −0.09 (syst.) × 10 6 cm −2 s −1 based on events with a measured kinetic enegy above 5 MeV. The non- ν e component is φ μτ = 3.41 +0.45 −0.45 (stat.) +0.48 −0.45 (syst.) × 10 6 cm −2 s −1 , 5.3 σ greater than zero, providing strong evidence for solar ν e flavor transformation. The total flux measured with the NC reaction is φ NC = 5.09 +0.044 −0.43 (stat.) +0.46 −0.43 (syst.) × 10 6 cm −2 s −1 , consistent with solar models. The night minus day rate is 14.0% ± 6.3% +1.5 −1.4 % of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the ν e asymmetry is found to be 7.0% ± 4.9% +1.3 −1.2 %. A global solar neutrino analysis is terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution.
Published: 2016

5. Constraints on nucleon decay via invisible modes from the Sudbury Neutrino Observatory

Author: X. Chen, H. Wan Chan Tseung, H. Labranche, D. L. Wark, F. Dalnoki-Veress, A. D. Marino, B. C. Robertson, N. McCauley, R. L. Helmer, G. Doucas, R. Van Berg, R. G. H. Robertson, J. B. Wilhelmy, T. Kutter, M. G. Bowler, I. Levine, M. L. Chen, Monica Dunford, S. S.E. Rosendahl, Chris Waltham, C. J. Virtue, S. J. Brice, A. W. P. Poon, J. A. Dunmore, R. L. Hahn, R. W. Ollerhead, C. W. Nally, G. McGregor, P. Jagam, K.K.S. Miknaitis, J. M. Wouters, S. Majerus, P. Skensved, X. Dai, J. F. Wilkerson, R. G. Van de Water, Joshua R. Klein, N. Gagnon, Reda Tafirout, N. Starinsky, Darren Grant, Alain Bellerive, R. S. Dosanjh, R. Lange, Mark Neubauer, W. Frati, S. N. Ahmed, R. Hazama, E. D. Earle, E. Rollin, W. B. Handler, H. B. Mak, T. J. Bowles, Andrew Hime, J. R. Wilson, Guthrie Miller, M. W.E. Smith, F. A. Duncan, M. A. Howe, A. B. McDonald, Christopher C. M. Kyba, R. MacLellan, M. A. Thomson, J. Heise, S. D. Biller, J. R. Leslie, B. A. Moffat, Bernie G. Nickel, J. Boger, F. Fleurot, M. H. Schwendener, B. T. Cleveland, Malcolm M. Fowler, N. S. Oblath, A. E. Anthony, N. West, A. V. Krumins, C. A. Duba, S. Luoma, Joseph A. Formaggio, C. Ouellet, Minfang Yeh, C. E. Okada, P. J. Harvey, W. J. Heintzelman, S. R. Elliott, O. Simard, David A. Sinclair, G. T. Ewan, I. T. Lawson, G. Tešić, A. L. Hallin, C. Mifflin, S. J. M. Peeters, N. A. Jelley, M. Thorman, D. Waller, V. L. Rusu, J. C. Hall, J. Law, M. R. Dragowsky, G. A. Cox, K. T. Lesko, L. C. Stonehill, J. Farine, C. J. Sims, C. K. Hargrove, A. J. Noble, T. V. Bullard, R. J. Hemingway, Kai Zuber, H. Fergani, J. Maneira, M. Kos, A. S. Hamer, Hal Evans, E. W. Beier, S. McGee, R. G. Stokstad, B. L. Wall, Peter Wittich, Eric B. Norman, E. D. Hallman, P. J. Doe, Y. Takeuchi, J. J. Simpson, Yuen-Dat Chan, K. Graham, S. M. Oser, M.G. Boulay, B. G. Fulsom, K. Frame, K. M. Heeger, and John L. Orrell
Subjects: Physics, Sudbury Neutrino Observatory, Particle physics, Proton, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Gamma ray, FOS: Physical sciences, General Physics and Astronomy, Elementary particle, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Baryon, High Energy Physics - Experiment (hep-ex), Particle decay, 0103 physical sciences, Neutron, High Energy Physics::Experiment, 010306 general physics, Nucleon, Nuclear Experiment
Abstract: Data from the Sudbury Neutrino Observatory have been used to constrain the lifetime for nucleon decay to ``invisible'' modes, such as n -> 3 nu. The analysis was based on a search for gamma-rays from the de-excitation of the residual nucleus that would result from the disappearance of either a proton or neutron from O16. A limit of tau_inv > 2 x 10^{29} years is obtained at 90% confidence for either neutron or proton decay modes. This is about an order of magnitude more stringent than previous constraints on invisible proton decay modes and 400 times more stringent than similar neutron modes., Update includes missing efficiency factor (limits change by factor of 2) Submitted to Physical Review Letters
Published: 2016

6. SEARCHES FOR HIGH-FREQUENCY VARIATIONS IN THE B-8 SOLAR NEUTRINO FLUX AT THE SUDBURY NEUTRINO OBSERVATORY

Author: E. D. Hallman, G. Prior, Benjamin Monreal, E. D. Earle, P. J. Doe, S. J. M. Peeters, K. J. Keeter, T. Tsui, F. A. Duncan, P. Skensved, M. DiMarco, K. Boudjemline, Yuen-Dat Chan, J. M. Wouters, J. Heise, S. Habib, K. Graham, X. Dai, S. M. Oser, J. A. Detwiler, Keith Rielage, H. Wan Chan Tseung, M. L. Miller, A. B. McDonald, R. D. Martin, Andrew Hime, I. Levine, Jocelyn Monroe, Alain Bellerive, D. L. Wark, R. J. Ford, T. J. Sonley, R. L. Hahn, H. Fergani, R. G. H. Robertson, M. H. Schwendener, R. MacLellan, Monica Dunford, J. Maneira, B. Beltran, Mark Guy Boulay, Bei Cai, David A. Sinclair, C. A. Duba, F. Zhang, J. Law, D. Chauhan, Peter Watson, B. Jamieson, A. W. P. Poon, Christopher C. M. Kyba, P.-L. Drouin, N. Tolich, C. B. Krauss, N. S. Oblath, B. Aharmim, T.H. Burritt, Kai Zuber, C. D. Tunnell, A. L. Hallin, R. L. Helmer, B. Morissette, J. A. Secrest, I. T. Lawson, C. Kraus, B. T. Cleveland, S. R. Seibert, D. Waller, G. A. Cox, R. A. Ott, N. West, W. J. Heintzelman, K. T. Lesko, J. R. Wilson, M. Kos, A. Wright, O. Simard, E. W. Beier, B.A. VanDevender, L. C. Stonehill, C. Howard, J. Farine, A. J. Noble, C. J. Virtue, B. C. Robertson, G. Doucas, E. Guillian, T. Kutter, N. Barros, Joseph A. Formaggio, Minfang Yeh, J. C. Loach, N. A. Jelley, Hal Evans, S. D. Reitzner, S. N. Ahmed, Joshua R. Klein, M. Bergevin, N. McCauley, R. Van Berg, M. L. Chen, S. Majerus, L. L. Kormos, G. T. Ewan, N. Gagnon, R. Hazama, G. D. Orebi Gann, H. Deng, B. L. Wall, H. M. O'Keeffe, H. B. Mak, S. McGee, S. D. Biller, Bernie G. Nickel, P. J. Harvey, J. F. Wilkerson, Steven Elliott, M. A. Howe, M. Huang, G. Tešić, J. R. Leslie, F. Fleurot, A. E. Anthony, and J. Tm. Goon
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, FOS: Physical sciences, Astrophysics, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Observatory, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Nuclear Experiment (nucl-ex), 010303 astronomy & astrophysics, Nuclear Experiment, Solar and Stellar Astrophysics (astro-ph.SR), Physics, Sudbury Neutrino Observatory, Solar observatory, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, Solar neutrino problem, Neutrino detector, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Physics::Space Physics, Measurements of neutrino speed, Neutrino
Abstract: We have performed three searches for high-frequency signals in the solar neutrino flux measured by the Sudbury Neutrino Observatory (SNO), motivated by the possibility that solar $g$-mode oscillations could affect the production or propagation of solar $^8$B neutrinos. The first search looked for any significant peak in the frequency range 1/day to 144/day, with a sensitivity to sinusoidal signals with amplitudes of 12% or greater. The second search focused on regions in which $g$-mode signals have been claimed by experiments aboard the SoHO satellite, and was sensitive to signals with amplitudes of 10% or greater. The third search looked for extra power across the entire frequency band. No statistically significant signal was detected in any of the three searches., 37 pages, 17 figures, submitted to ApJ
Published: 2016

7. Does greater night‐time, rather than constant, warming alter growth of managed pasture under under ambient and elevated atmospheric CO 2 ?

Author: Astrid Volder, John R. Evans, B C Robertson, Marcus Schortemeyer, Roger M. Gifford, and Everard J. Edwards
Subjects: Biomass (ecology), geography, geography.geographical_feature_category, biology, Physiology, Global warming, Plant Science, Seasonality, Phalaris aquatica, biology.organism_classification, medicine.disease, Pasture, chemistry.chemical_compound, Animal science, chemistry, Air temperature, Carbon dioxide, Botany, medicine, Environmental science, Poaceae
Abstract: Summary • This study examined the effects of warming, elevated atmospheric CO 2 and cutting regimen on the growth of Phalaris aquatica cv. Holdfast swards. • Six temperature gradient tunnels (TGT) were used to manipulate both air temperature and atmospheric CO 2 concentrations (ambient and 750 ppm). Within each tunnel, there were three temperature treatments: no warming, constant warming of +3.0 ° C and a daytime warming of 2.2 ° C combined with a night-time warming of 4.0 ° C and two defoliation frequencies. •A veraged across 20 months of growth, there was a positive effect of elevated atmospheric CO 2 (+11%), no effect of either warming treatment and a negative effect of frequent cutting ( − 19%) on total above ground biomass production. The responses to all treatments, however, were strongly seasonal. • Positive responses to CO 2 were statistically significant only in the spring, when plant growth was strongest. No evidence was found that high night-time warming had different effects on plant growth and plant responses to elevated atmospheric CO 2 , than constant warming.
Published: 2004

8. Measurement of the induced pseudoscalar coupling using radiative muon capture on hydrogen

Author: D. H. Wright, S. Ahmad, D. S. Armstrong, G. Azuelos, W. Bertl, M. Blecher, C. Q. Chen, P. Depommier, B. C. Doyle, T. von Egidy, T. P. Gorringe, P. Gumplinger, M. D. Hasinoff, D. Healey, G. Jonkmans, A. J. Larabee, J. A. Macdonald, S. C. McDonald, M. Munro, J.-M. Poutissou, R. Poutissou, B. C. Robertson, D. G. Sample, E. Saettler, C. N. Sigler, G. N. Taylor, and N. S. Zhang
Subjects: Physics, Pseudoscalar, Nuclear and High Energy Physics, Particle physics, Muon, Branching fraction, Strong interaction, Scalar (mathematics), High Energy Physics::Experiment, Weak interaction, Pseudovector, Muon capture
Abstract: A pure weak interaction such as muon decay μ → ev $\overline{v}$ is characterized by a V-A amplitude. When hadrons participate the strong force induces additional couplings and the reaction is classified as semi-leptonic. These additional couplings are real due to time reversal invariance. The scalar and tensor couplings are expected to vanish because these currents have the wrong G-parity and experimentally non-zero values have not been found. In beta decay n → pe $\overline{v}$ the renormalized axial vector strength, g a , and the weak magnetism strength, g m , which is predicted by CVC, are accurately measured.
Published: 1998

9. α-particle inducedγ-ray transitions in light elements

Author: H.W. Lee, R.K. Heaton, B. C. Robertson, K. T. Lesko, Eric B. Norman, and Bhaskar Sur
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Silicon, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, chemistry.chemical_element, Alpha particle, chemistry, Aluminium, Atomic physics, Beryllium, Nuclear Experiment, Excitation
Abstract: The absolute {gamma}-ray yields from {alpha}-particle-induced reactions on thick targets of Be, BN, NaF, Mg, Al, and Si for incident energies between 5.6 and 10 MeV are presented. The excitation distributions of several nuclei have been deduced from the experimental {gamma}-ray yields and are compared to theoretical predictions based on a statistical model of nuclear reactions. {copyright} {ital 1997} {ital The American Physical Society}
Published: 1997

10. Combined analysis of all three phases of solar neutrino data from the Sudbury Neutrino Observatory

Author: M. Kos, Peter Watson, L. L. Kormos, Jocelyn Monroe, B. C. Robertson, G. T. Ewan, K. Boudjemline, M. H. Schwendener, M. Huang, E. Guillian, B. Aharmim, T. Kutter, B. G. Nickel, P. J. Doe, F. Zhang, J. R. Leslie, A. W. P. Poon, M. Bergevin, N. Gagnon, J. Law, G. D. Orebi Gann, P.-L. Drouin, Yuen-Dat Chan, K. Graham, F. A. Duncan, S. M. Oser, Hal Evans, N. McCauley, M. L. Miller, B. Beltran, G. Prior, S. D. Reitzner, S. N. Ahmed, R. D. Martin, H. Deng, Christopher C. M. Kyba, Steven Elliott, R. G. H. Robertson, R. J. Ford, C. Kraus, T. Sonley, R. Van Berg, Kai Zuber, P. Jagam, Rachel Rosten, M. Dunford, J. Wendland, S. J. M. Peeters, Olivier Simard, Keith Rielage, A. L. Hallin, A. Krüger, J. F. Wilkerson, G. Doucas, R. W. Ollerhead, A. Hime, N. West, A. J. Noble, C. B. Krauss, W. J. Heintzelman, F. Fleurot, A. E. Anthony, H. Wan Chan Tseung, M. L. Chen, S. Habib, Bei Cai, H. M. O'Keeffe, K. T. Lesko, D. L. Wark, D. Chauhan, Joseph A. Formaggio, Minfang Yeh, J. M. Wouters, Ryuta Hazama, B. T. Cleveland, S. Majerus, J. C. Loach, N. A. Jelley, H. B. Mak, J. Maneira, M. Jerkins, N. Tolich, J. J. Simpson, G. Tešić, J. Tm. Goon, A. B. McDonald, S. McGee, R. L. Hahn, S. D. Biller, R. A. Ott, P. J. Harvey, C. J. Virtue, E. D. Hallman, N. Barros, B.A. VanDevender, C. Howard, J. Farine, J. R. Wilson, J. Heise, T. Tsui, E. W. Beier, M. DiMarco, B. Jamieson, S. Seibert, R. MacLellan, N. S. Oblath, Mark Guy Boulay, R. L. Helmer, J. R. Klein, P. Skensved, X. Dai, J. A. Detwiler, R. Lange, J. A. Secrest, I. T. Lawson, L. C. Stonehill, G. A. Cox, Benjamin Monreal, E. D. Earle, K. J. Keeter, A. Wright, H. Fergani, and Alain Bellerive
Subjects: Nuclear and High Energy Physics, Particle physics, Solar neutrino, FOS: Physical sciences, Cosmic ray, 7. Clean energy, 01 natural sciences, Particle identification, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Charged current, Solar and Stellar Astrophysics (astro-ph.SR), Physics, Sudbury Neutrino Observatory, Neutral current, 010308 nuclear & particles physics, QC0793, High Energy Physics - Phenomenology, Astrophysics - Solar and Stellar Astrophysics, Neutrino
Abstract: We report results from a combined analysis of solar neutrino data from all phases of the Sudbury Neutrino Observatory. By exploiting particle identification information obtained from the proportional counters installed during the third phase, this analysis improved background rejection in that phase of the experiment. The combined analysis resulted in a total flux of active neutrino flavors from 8B decays in the Sun of (5.25 \pm 0.16(stat.)+0.11-0.13(syst.))\times10^6 cm^{-2}s^{-1}. A two-flavor neutrino oscillation analysis yielded \Deltam^2_{21} = (5.6^{+1.9}_{-1.4})\times10^{-5} eV^2 and tan^2{\theta}_{12}= 0.427^{+0.033}_{-0.029}. A three-flavor neutrino oscillation analysis combining this result with results of all other solar neutrino experiments and the KamLAND experiment yielded \Deltam^2_{21} = (7.41^{+0.21}_{-0.19})\times10^{-5} eV^2, tan^2{\theta}_{12} = 0.446^{+0.030}_{-0.029}, and sin^2{\theta}_{13} = (2.5^{+1.8}_{-1.5})\times10^{-2}. This implied an upper bound of sin^2{\theta}_{13} < 0.053 at the 95% confidence level (C.L.).
Published: 2013

11. Measurement of theνeand total8B solar neutrino fluxes with the Sudbury Neutrino Observatory phase-III data set

Author: M. DiMarco, R. J. Ford, R. W. Ollerhead, R. MacLellan, Mark Guy Boulay, P. Jagam, M. H. Schwendener, A. Krüger, B. C. Robertson, J. Tm. Goon, N. Gagnon, G. Doucas, F. Zhang, J. R. Wilson, J. B. Wilhelmy, S. Habib, R. L. Helmer, S. R. Seibert, J. Law, T. Kutter, J. Heise, N. West, P.-L. Drouin, P. Skensved, Hal Evans, F. Fleurot, G. D. Orebi Gann, J. F. Amsbaugh, Ryuta Hazama, H. Wan Chan Tseung, M. L. Miller, A. E. Anthony, J. V. Germani, E. D. Hallman, W. J. Heintzelman, H. Deng, K. M. Heeger, E. Guillian, C. Kraus, S. D. Biller, J. R. Leslie, S. Majerus, Yuen-Dat Chan, K. Boudjemline, K. Graham, M. W.E. Smith, L. L. Kormos, Alain Bellerive, Bernie G. Nickel, J. Wendland, S. M. Oser, S. R. Elliott, G. T. Ewan, Andrew Hime, Joshua R. Klein, A. W. Myers, P. J. Harvey, Juan-Manuel Anaya, J. Banar, K. T. Lesko, Monica Dunford, J. Maneira, M. A. Howe, M. Huang, Reyco Henning, P. M. Thornewell, N. Barros, T. J. Sonley, A. W. P. Poon, S. D. Reitzner, S. N. Ahmed, R. D. Martin, J. J. Simpson, Malcolm M. Fowler, Kai Zuber, T. J. Bowles, C. D. Tunnell, P. J. Doe, G. Tešić, J. A. Formaggio, M. Bergevin, C. A. Duba, N. McCauley, A. Goldschmidt, Bei Cai, Minfang Yeh, E. Rollin, R. G. H. Robertson, R. A. Ott, T.H. Burritt, D. Chauhan, R. Van Berg, H. B. Mak, C. J. Virtue, B. Jamieson, J. F. Wilkerson, T. D. Van Wechel, K. J. Keeter, A. Wright, J. C. Loach, C. Currat, N. A. Jelley, S. J. M. Peeters, T. D. Steiger, M. L. Chen, T. V. Bullard, M. Kos, A. A. Hamian, O. Simard, X. Dai, J. A. Detwiler, R. Lange, G. Prior, C. Howard, E. W. Beier, J. Farine, R. L. Hahn, M. C. Browne, A. J. Noble, L. C. Stonehill, S. McGee, J. M. Wouters, A. B. McDonald, Christopher C. M. Kyba, B. L. Wall, B. T. Cleveland, H. M. O'Keeffe, Keith Rielage, Jocelyn Monroe, B. Aharmim, B. Beltran, A. L. Hallin, C. Mifflin, N. S. Oblath, C. B. Krauss, M. R. Dragowsky, B. A. VanDevender, N. Tolich, Guthrie Miller, B. Morissette, Benjamin Monreal, E. D. Earle, G. C. Harper, F. A. Duncan, J. A. Secrest, I. T. Lawson, D. Waller, G. A. Cox, H. Fergani, and T. Tsui
Subjects: Physics, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, Solar energetic particles, 010308 nuclear & particles physics, Solar neutrino, Cosmic ray, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Neutrino, 010306 general physics, Neutrino oscillation, Charged current, Lepton
Abstract: This paper details the solar neutrino analysis of the 385.17-day phase-III data set acquired by the Sudbury Neutrino Observatory (SNO). An array of He-3 proportional counters was installed in the heavy-water target to measure precisely the rate of neutrino-deuteron neutral-current interactions. This technique to determine the total active B-8 solar neutrino flux was largely independent of the methods employed in previous phases. The total flux of active neutrinos was measured to be 5.54(-0.31)(+0.33)(stat.)(-0.34)(+0.36)(syst.) x 10(6) cm(-2) s(-1), consistent with previous measurements and standard solar models. A global analysis of solar and reactor neutrino mixing parameters yielded the best-fit values of Delta m(2) = 7.59(-0.21)(+0.19) x 10(-5) eV(2) and theta = 34.4(-1.2)(+1.3) degrees. DOI: 10.1103/PhysRevC.87.015502
Published: 2013

12. A Search for Astrophysical Burst Signals at the Sudbury Neutrino Observatory

Author: P. Skensved, Monica Dunford, J. Maneira, S. J. M. Peeters, A. W. P. Poon, J. Tm. Goon, Jocelyn Monroe, J. A. Secrest, I. T. Lawson, S. Habib, J. Wendland, C. J. Virtue, G. Prior, N. Barros, D. Waller, Yuen-Dat Chan, K. Graham, David A. Sinclair, T. Tsui, G. A. Cox, Kai Zuber, Joseph A. Formaggio, J. Heise, Christopher C. M. Kyba, A. Wright, X. Dai, Minfang Yeh, E. D. Hallman, K. Boudjemline, M. DiMarco, F. Fleurot, J. A. Detwiler, R. Lange, S. M. Oser, Benjamin Monreal, B. Aharmim, E. D. Earle, J. C. Loach, N. A. Jelley, O. Simard, I. Levine, D. Chauhan, C. Kraus, A. E. Anthony, B. Beltran, M. L. Miller, K. J. Keeter, B. C. Robertson, S. D. Reitzner, S. N. Ahmed, S. Majerus, J. F. Wilkerson, N. West, G. Doucas, M. Bergevin, C. B. Krauss, N. S. Oblath, A. Krueger, W. J. Heintzelman, T. Kutter, J. J. Simpson, R. A. Ott, M. H. Schwendener, N. McCauley, T. J. Sonley, P. J. Doe, H. Fergani, P. Jagam, F. Zhang, A. L. Hallin, R. L. Hahn, Keith Rielage, K. T. Lesko, Peter Watson, Alain Bellerive, R. Van Berg, R. J. Ford, Bei Cai, J. Law, N. Tolich, J. R. Wilson, M. Kos, B. T. Cleveland, P.-L. Drouin, R. MacLellan, S. R. Seibert, E. W. Beier, Mark Guy Boulay, Min Chen, H. Wan Chan Tseung, Steven Elliott, L. C. Stonehill, D. L. Wark, Hal Evans, J. M. Wouters, Joshua R. Klein, J. R. Leslie, E. Guillian, A. B. McDonald, B.A. VanDevender, Andrew Hime, C. Howard, J. Farine, A. J. Noble, M. Jerkins, F. A. Duncan, M. Huang, Miriam Diamond, G. Tešić, R. D. Martin, R. G. H. Robertson, H. B. Mak, L. L. Kormos, S. McGee, G. T. Ewan, B. L. Wall, N. Gagnon, R. Hazama, G. D. Orebi Gann, H. Deng, H. M. O'Keeffe, S. D. Biller, R. L. Helmer, Bernie G. Nickel, P. J. Harvey, R.W. Ollerhead, B. Jamieson, Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, Formaggio, Joseph A., Miller, Michael L., Monreal, Benjamin, Monroe, Jocelyn, Solomon-Oblath, Noah, Ott, Richard A., and Sonley, Thomas J.
Subjects: Physics, Sudbury Neutrino Observatory, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Solar neutrino problem, Neutrino detector, Astrophysics - Solar and Stellar Astrophysics, Measurements of neutrino speed, Astrophysics::Solar and Stellar Astrophysics, High Energy Physics::Experiment, Neutrino astronomy, Neutrino, Nuclear Experiment (nucl-ex), Neutrino oscillation, Nuclear Experiment, QC, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract: The Sudbury Neutrino Observatory (SNO) has confirmed the standard solar model and neutrino oscillations through the observation of neutrinos from the solar core. In this paper we present a search for neutrinos associated with sources other than the solar core, such as gamma-ray bursts and solar flares. We present a new method for looking for temporal coincidences between neutrino events and astrophysical bursts of widely varying intensity. No correlations were found between neutrinos detected in SNO and such astrophysical sources., United States. Dept. of Energy, National Energy Research Scientific Computing Center (U.S.), Alfred P. Sloan Foundation
Published: 2013
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13. α-particle induced high-energy γ-ray yields from light elements

Author: H.W. Lee, B. C. Robertson, Eric B. Norman, B. Sur, R. Heaton, and K. T. Lesko
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), High energy, Magnesium, Analytical chemistry, chemistry.chemical_element, chemistry.chemical_compound, chemistry, Aluminium, Boron nitride, Beryllium, Instrumentation, α particles, Intensity (heat transfer)
Abstract: Alpha-induced thick-target γ-ray yields from light elements have been measured in the energy range 5.6 MeV ≤ Ea ≤ 10 MeV. The γ-ray yields above 2 MeV from thick targets of beryllium, boron nitride, sodium fluoride, magnesium, and aluminum were measured, and the results of this experiment were used to construct tables suitable for calculating the α-induced direct production γ-ray intensity distributions from materials. These results show a significant reduction compared with previous estimates of the distribution.
Published: 1995

14. LOW-MULTIPLICITY BURST SEARCH AT THE SUDBURY NEUTRINO OBSERVATORY

Author: J. A. Secrest, G. T. Ewan, E. Guillian, B. C. Robertson, G. Doucas, T. Kutter, S. D. Biller, J. J. Simpson, Bernie G. Nickel, F. Fleurot, A. E. Anthony, P. J. Harvey, N. West, C. J. Virtue, T. Tsui, W. J. Heintzelman, R. A. Ott, Benjamin Monreal, E. D. Earle, M. Huang, K. T. Lesko, K. Boudjemline, Monica Dunford, N. Barros, Hal Evans, E. D. Hallman, M. L. Miller, J. Maneira, S. R. Seibert, Christopher C. M. Kyba, B. Beltran, A. W. P. Poon, T. J. Sonley, Keith Rielage, M. Kos, S. D. Reitzner, S. N. Ahmed, Joseph A. Formaggio, R. D. Martin, Minfang Yeh, J. R. Wilson, G. Prior, R. G. H. Robertson, Joshua R. Klein, J. R. Leslie, J. Heise, J. C. Loach, N. A. Jelley, N. Gagnon, G. Tešić, H. M. O'Keeffe, R. J. Ford, H. Fergani, A. Wright, R. Hazama, G. D. Orebi Gann, Bei Cai, E. W. Beier, S. Habib, A. L. Hallin, Steven Elliott, R. MacLellan, R. L. Helmer, H. Deng, Jocelyn Monroe, H. B. Mak, B.A. VanDevender, Mark Guy Boulay, O. Simard, C. Howard, J. Farine, B. Aharmim, M. Jerkins, A. J. Noble, C. B. Krauss, N. S. Oblath, J. F. Wilkerson, David A. Sinclair, S. J. M. Peeters, C. Kraus, Peter Watson, J. T.M. Goon, Yuen-Dat Chan, F. A. Duncan, K. Graham, D. Chauhan, S. M. Oser, N. Tolich, P. Skensved, A. B. McDonald, L. C. Stonehill, and K. Zuber, R. L. Hahn, H. Wan Chan Tseung, B. T. Cleveland, M. Bergevin, Alain Bellerive, X. Dai, J. A. Detwiler, N. McCauley, R. Van Berg, B. Jamieson, M. L. Chen, S. Majerus, Andrew Hime, M. H. Schwendener, F. Zhang, J. Law, and P.-L. Drouin
Subjects: Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Elementary particle, Astrophysics, 01 natural sciences, High Energy Physics - Experiment, Massless particle, High Energy Physics - Experiment (hep-ex), Supernova, Space and Planetary Science, 0103 physical sciences, Neutrino, Multiplicity (chemistry), 010306 general physics
Abstract: Results are reported from a search for low-multiplicity neutrino bursts in the Sudbury Neutrino Observatory (SNO). Such bursts could indicate detection of a nearby core-collapse supernova explosion. The data were taken from Phase I (November 1999 - May 2001), when the detector was filled with heavy water, and Phase II (July 2001 - August 2003), when NaCl was added to the target. The search was a blind analysis in which the potential backgrounds were estimated and analysis cuts were developed to eliminate such backgrounds with 90% confidence before the data were examined. The search maintained a greater than 50% detection probability for standard supernovae occurring at a distance of up to 60 kpc for Phase I and up to 70 kpc for Phase II. No low-multiplicity bursts were observed during the data-taking period., 11 pages, 4 figures, submitted to ApJ
Published: 2011

15. Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

Author: Monica Dunford, J. Maneira, A. W. P. Poon, Christopher C. M. Kyba, J. R. Leslie, J. Tm. Goon, J. F. Wilkerson, Joseph A. Formaggio, M. Kos, Minfang Yeh, C. J. Virtue, C. B. Krauss, N. S. Oblath, M. L. Miller, E. W. Beier, J. C. Loach, B. Beltran, R. A. Ott, R. D. Martin, H. B. Mak, N. A. Jelley, Jocelyn Monroe, N. Gagnon, Andrew Hime, I. Levine, R. G. H. Robertson, E. D. Hallman, M. Huang, G. Tešić, F. A. Duncan, Howe, F. Fleurot, R. Hazama, Yuen-Dat Chan, K. Graham, A. L. Hallin, J. R. Wilson, Kai Zuber, C. D. Tunnell, S. McGee, B. C. Robertson, A. E. Anthony, S. M. Oser, G. D. Orebi Gann, S. D. Biller, N. Barros, Bernie G. Nickel, B. Aharmim, G. Doucas, A. B. McDonald, C. Kraus, S. J. M. Peeters, P. J. Harvey, J.M. Wouters, R. L. Hahn, H. Deng, T. Tsui, S. Habib, N. Tolich, T. Kutter, P. Skensved, M. DiMarco, Steven Elliott, B.A. VanDevender, P. J. Doe, R. J. Ford, M. H. Schwendener, F. Zhang, J. Law, B. L. Wall, Hal Evans, David A. Sinclair, H. M. O'Keeffe, K. Boudjemline, N. West, W. J. Heintzelman, K. T. Lesko, C. Howard, J. Farine, A. J. Noble, B. Morissette, Keith Rielage, K. J. Keeter, T. J. Sonley, Bei Cai, E. Guillian, R. MacLellan, D. Chauhan, Mark Guy Boulay, L. L. Kormos, P.-L. Drouin, B. Jamieson, R. L. Helmer, G. T. Ewan, S. D. Reitzner, S. N. Ahmed, S. R. Seibert, J. Heise, X. Dai, J. A. Detwiler, C. A. Duba, H. Fergani, J. A. Secrest, I. T. Lawson, D. Waller, G. A. Cox, Benjamin Monreal, E. D. Earle, H. Wan Chan Tseung, D. L. Wark, G. Prior, T.H. Burritt, B. T. Cleveland, A. Wright, O. Simard, Alain Bellerive, L. C. Stonehill, M. Bergevin, N. McCauley, R. Van Berg, M. L. Chen, S. Majerus, and Joshua R. Klein
Subjects: Nuclear and High Energy Physics, Particle physics, Solar neutrino, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Charged current, Physics, Research Groups and Centres\Physics\Low Temperature Physics, Sudbury Neutrino Observatory, Faculty of Science\Physics, 010308 nuclear & particles physics, Solar neutrino problem, High Energy Physics - Phenomenology, 13. Climate action, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Lepton
Abstract: Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is T_eff=3.5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 10^6 cm^{-2} s^{-1}, the total flux of active-flavor neutrinos from 8B decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the 8B neutrino energy spectrum, is found to be Phi_NC = 5.140 ^{+0.160}_{-0.158} (stat) ^{+0.132}_{-0.117} (syst). These uncertainties are more than a factor of two smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the SNO data in which the free parameters directly describe the total 8B neutrino flux and the energy-dependent nu_e survival probability provides a measure of the total 8B neutrino flux Phi_8B = 5.046 ^{+0.159}_{-0.152} (stat) ^{+0.107}_{-0.123} (syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of theta_{12}=34.06 ^{+1.16}_{-0.84} degrees and Delta m^2_{21}=7.59 ^{+0.20}_{-0.21} x 10^{-5} eV^2. The global value of Phi_8B is extracted to a precision of ^{+2.38}_{-2.95} %. In a three-flavor analysis the best fit value of sin^2\theta_{13} is 2.00 ^{+2.09}_{-1.63} x 10^{-2}. Interpreting this as a limit implies an upper bound of sin^2\theta_{13} < 0.057 (95% C. L.)., Comment: 53 pages, 40 figures, submitted to Phys. Rev. C
Published: 2010

16. Measurement of the slope of the π0 electromagnetic form factor

Author: B. C. Robertson, J. M. Poutissou, C.J. Virtue, S.H. Chew, A. Shor, T. Mulera, Chris Waltham, F. Farzanpay, M. D. Hasinoff, A.W. Stetz, J. Lowe, P. Gumplinger, and I. Blevis
Subjects: Nuclear physics, Quark, Physics, Loop (topology), Nuclear and High Energy Physics, Branching fraction, Quantum electrodynamics, Form factor (quantum field theory), Value (computer science), High Energy Physics::Experiment
Abstract: We have measured the slope parameter of the π 0 electromagnetic form factor by measuring the partial branching ratio of the Dalitz decay π 0 → γe + e − into high-invariant-mass electron-positron pairs. We obtain a value a =0.026 with a total (statistical and systematic) error of ±0.054, in agreement with vector dominance and quark loop calculations.
Published: 1992

17. Radiative muon capture on hydrogen

Author: D. G. Sample, S. C. McDonald, R. Henderson, B. C. Robertson, Georges Azuelos, N. S. Zhang, T. von Egidy, P. Depommier, Shama Ahmad, W. Bertl, W. Schott, G. N. Taylor, D. H. Wright, J. M. Poutissou, M. Blecher, G. Jonkmans, C. Q. Chen, D. S. Armstrong, R. Poutissou, J. A. Macdonald, M. D. Hasinoff, A. J. Larabee, P. Gumplinger, and T. P. Gorringe
Subjects: Physics, Particle physics, Schedule, Muon, Physics and Astronomy (miscellaneous), Hydrogen, Form factor (quantum field theory), chemistry.chemical_element, Measure (mathematics), Particle detector, Muon capture, Massless particle, Nuclear physics, Pseudoscalar, Particle decay, chemistry, Radiative transfer, Engineering (miscellaneous), Lepton
Abstract: The radiative capture of negative muons by protons can be used to measure the weak induced pseu-doscalar form factor. Brief arguments why this method is preferable to ordinary muon capture are given followed by a discussion of the experimental difficulties. The solution to these problems as attempted by experiment #452 at TRIUMF is presented together with preliminary results from the first run in August 1990. An outlook on the expected final precision and the experimental schedule is also given.
Published: 1992

18. Measurement of the cosmic ray and neutrino-induced muon flux at the Sudbury neutrino observatory

Author: I. Levine, H. M. O'Keeffe, M. L. Miller, R. D. Martin, R. G. H. Robertson, X. Dai, J. A. Detwiler, Keith Rielage, T.H. Burritt, J. R. Leslie, T. J. Sonley, R. Lange, Christopher C. M. Kyba, S. N. Ahmed, Bei Cai, Yuen-Dat Chan, K. Graham, S. M. Oser, Jocelyn Monroe, N. Barros, S. R. Seibert, Reyco Henning, M.G. Boulay, C. A. Currat, N. Gagnon, G. T. Ewan, R. Hazama, M. A. Howe, M. Huang, G. D. Orebi Gann, B. Aharmim, M. W.E. Smith, H. Deng, P. Skensved, C. K. Hargrove, T. Tsui, H. B. Mak, M. Bergevin, H. Wan Chan Tseung, K. Boudjemline, J. R. Wilson, C. E. Okada, J. J. Simpson, Chris Waltham, S. Habib, D. L. Wark, G. Tešić, C. Kraus, A. Wright, David A. Sinclair, O. Simard, J. Wendland, Steven Elliott, A. D. Marino, N. McCauley, S. McGee, G. Prior, S. D. Biller, Y. Opachich, P. J. Harvey, J. M. Wouters, C. B. Krauss, N. S. Oblath, Alain Bellerive, J. F. Wilkerson, S. J. M. Peeters, J. T.M. Goon, Darren Grant, B. Jamieson, Hal Evans, L. C. Stonehill, B. T. Cleveland, R. L. Helmer, A. B. McDonald, E. Guillian, C. J. Virtue, E. D. Hallman, T. C. Andersen, Monica Dunford, J. Maneira, R. L. Hahn, A. W. P. Poon, B. C. Robertson, G. Doucas, P. J. Doe, R. A. Ott, K. M. Heeger, T. D. Steiger, T. Kutter, M. L. Chen, R. J. Ford, B.A. VanDevender, R. MacLellan, Joseph A. Formaggio, C. Howard, J. Farine, Minfang Yeh, A. J. Noble, J. C. Loach, N. A. Jelley, S. Majerus, Joshua R. Klein, R. S. Dosanjh, Andrew Hime, E. Rollin, M. C. Chon, J. A. Secrest, I. T. Lawson, R. J. Hemingway, M. Kos, B. Beltran, E. W. Beier, D. Waller, A. L. Hallin, C. Mifflin, Kai Zuber, N. West, W. J. Heintzelman, H. Fergani, K. T. Lesko, Benjamin Monreal, N. Tagg, M. H. Schwendener, F. A. Duncan, F. Zhang, J. Law, P.-L. Drouin, Peter Watson, N. Tolich, G.A. Cox-Mobrand, F. Dalnoki-Veress, A. Krüger, R. G. Van de Water, J. Heise, F. Fleurot, A. E. Anthony, and S. Luoma
Subjects: Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Flux, FOS: Physical sciences, Cosmic ray, Astrophysics, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Neutrino oscillation, Zenith, Physics, Sudbury Neutrino Observatory, Research Groups and Centres\Physics\Low Temperature Physics, Muon, 010308 nuclear & particles physics, Faculty of Science\Physics, High Energy Physics::Phenomenology, Astrophysics::Instrumentation and Methods for Astrophysics, High Energy Physics::Experiment, Neutrino, Lepton
Abstract: Results are reported on the measurement of the atmospheric neutrino-induced muon flux at a depth of 2 kilometers below the Earth's surface from 1229 days of operation of the Sudbury Neutrino Observatory (SNO). By measuring the flux of through-going muons as a function of zenith angle, the SNO experiment can distinguish between the oscillated and un-oscillated portion of the neutrino flux. A total of 514 muon-like events are measured between $-1 \le \cos{\theta}_{\rm zenith} \le 0.4$ in a total exposure of 2.30\times 10^{14}$ cm$^{2}$ s. The measured flux normalization is $1.22 \pm 0.09$ times the Bartol three-dimensional flux prediction. This is the first measurement of the neutrino-induced flux where neutrino oscillations are minimized. The zenith distribution is consistent with previously measured atmospheric neutrino oscillation parameters. The cosmic ray muon flux at SNO with zenith angle $\cos{\theta}_{\rm zenith} > 0.4$ is measured to be $(3.31 \pm 0.01 {\rm (stat.)} \pm 0.09 {\rm (sys.)}) \times 10^{-10}~\mu$/s/cm$^{2}$., Comment: 17 pages, 11 figures
Published: 2009

19. Independent measurement of the total active 8B solar neutrino flux using an array of 3He proportional counters at the sudbury neutrino observatory

Author: B, Aharmim, S N, Ahmed, J F, Amsbaugh, A E, Anthony, J, Banar, N, Barros, E W, Beier, A, Bellerive, B, Beltran, M, Bergevin, S D, Biller, K, Boudjemline, M G, Boulay, T J, Bowles, M C, Browne, T V, Bullard, T H, Burritt, B, Cai, Y D, Chan, D, Chauhan, M, Chen, B T, Cleveland, G A, Cox-Mobrand, C A, Currat, X, Dai, H, Deng, J, Detwiler, M, DiMarco, P J, Doe, G, Doucas, P-L, Drouin, C A, Duba, F A, Duncan, M, Dunford, E D, Earle, S R, Elliott, H C, Evans, G T, Ewan, J, Farine, H, Fergani, F, Fleurot, R J, Ford, J A, Formaggio, M M, Fowler, N, Gagnon, J V, Germani, A, Goldschmidt, J T M, Goon, K, Graham, E, Guillian, S, Habib, R L, Hahn, A L, Hallin, E D, Hallman, A A, Hamian, G C, Harper, P J, Harvey, R, Hazama, K M, Heeger, W J, Heintzelman, J, Heise, R L, Helmer, R, Henning, A, Hime, C, Howard, M A, Howe, M, Huang, P, Jagam, B, Jamieson, N A, Jelley, K J, Keeter, J R, Klein, L L, Kormos, M, Kos, A, Krüger, C, Kraus, C B, Krauss, T, Kutter, C C M, Kyba, R, Lange, J, Law, I T, Lawson, K T, Lesko, J R, Leslie, J C, Loach, R, MacLellan, S, Majerus, H B, Mak, J, Maneira, R, Martin, K, McBryde, N, McCauley, A B, McDonald, S, McGee, C, Mifflin, G G, Miller, M L, Miller, B, Monreal, J, Monroe, B, Morissette, A, Myers, B G, Nickel, A J, Noble, N S, Oblath, H M, O'Keeffe, R W, Ollerhead, G D Orebi, Gann, S M, Oser, R A, Ott, S J M, Peeters, A W P, Poon, G, Prior, S D, Reitzner, K, Rielage, B C, Robertson, R G H, Robertson, E, Rollin, M H, Schwendener, J A, Secrest, S R, Seibert, O, Simard, J J, Simpson, L, Sinclair, P, Skensved, M W E, Smith, T D, Steiger, L C, Stonehill, G, Tesić, P M, Thornewell, N, Tolich, T, Tsui, C D, Tunnell, T, Van Wechel, R, Van Berg, B A, VanDevender, C J, Virtue, T J, Walker, B L, Wall, D, Waller, H Wan Chan, Tseung, J, Wendland, N, West, J B, Wilhelmy, J F, Wilkerson, J R, Wilson, J M, Wouters, A, Wright, M, Yeh, F, Zhang, and K, Zuber
Subjects: High Energy Physics::Experiment, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: The Sudbury Neutrino Observatory (SNO) used an array of 3He proportional counters to measure the rate of neutral-current interactions in heavy water and precisely determined the total active (nu_x) 8B solar neutrino flux. This technique is independent of previous methods employed by SNO. The total flux is found to be 5.54_-0.31;+0.33(stat)-0.34+0.36(syst)x10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of solar and reactor neutrino results yields Deltam2=7.59_-0.21;+0.19x10(-5) eV2 and theta=34.4_-1.2;+1.3 degrees. The uncertainty on the mixing angle has been reduced from SNO's previous results.
Published: 2008
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20. Photon asymmetry in radiative muon capture on calcium

Author: D. Horvath, C.J. Virtue, H.W. Roser, M. D. Hasinoff, B. C. Robertson, K.A. Aniol, and F. Entezami
Subjects: Physics, Nuclear reaction, Coupling constant, Nuclear and High Energy Physics, Photon, Branching fraction, media_common.quotation_subject, Electron, Asymmetry, Muon capture, Nuclear physics, Radiative transfer, High Energy Physics::Experiment, Atomic physics, media_common
Abstract: The photon asymmetry (α γ ) and partial branching ratio above 57 MeV ( R k > 57) have been measured for radiative muon capture on 40 Ca in order to determine the magnitude of the induced-pseudoscalar coupling constant, g p . Based on 2500 events a value of α γ = 1.32 +0.57 −0.47 is obtained from a fit to the photon time spectrum; this implies a value for g p g A . For the first time the asymmetry signal is clearly visible and unconstrained multi-parameter fits reproduce the parameters obtained from the decay electron spectrum. The present results are discussed and compared in detail with previous results.
Published: 1990

21. A cylindrical drift chamber for radiative muon capture experiments at TRIUMF

Author: B. C. Robertson, A. Serna-Angel, Shama Ahmad, D. H. Wright, Georges Azuelos, T. P. Gorringe, R.S. Henderson, R.J. Dawson, M. D. Hasinoff, and M. Blecher
Subjects: Physics, Nuclear and High Energy Physics, Muon, Branching fraction, Cyclotron, Photon energy, Muon capture, law.invention, Nuclear physics, Particle decay, Nuclear Energy and Engineering, law, Radiative transfer, Electrical and Electronic Engineering, Nuclear Experiment, Lepton
Abstract: Radiative muon capture (RMC), mu Z to nu (Z-1) gamma , is a process which is particularly sensitive to the induced pseudoscalar coupling constant, g/sub p/, which is still very poorly determined experimentally. Due to the extremely small branching ratio ( approximately 6*10/sup -8/), the elementary reaction mu p to nu n gamma has never been measured. To date, efforts have been concentrated on nuclear RMC where the branching ratio is much larger, but the interpretation of these results is hindered by nuclear structure uncertainties. A measurement is being carried out at TRIUMF to determine the rate of RMC on hydrogen to a precision of 8%, leading to a determination of g/sub p/ with an error of 10%. The detection system is based on a large-volume cylindrical drift chamber, in an axial magnetic field, acting as an e/sup +/e/sup -/ pair spectrometer with a solid angle of approximately=2 pi . At a magnetic field of 2.7 kG, the acceptance of 70-MeV photons is about 0.8% for a 1.0-mm-thick Pb photon converter. Monte Carlo calculations indicate a photon energy resolution of >
Published: 1990

22. Determination of theνeand totalB8solar neutrino fluxes using the Sudbury Neutrino Observatory Phase I data set

Author: M. Huang, R. U. Haq, C. B. Krauss, N. S. Oblath, Malcolm M. Fowler, J. Wendland, F. A. Duncan, J. A. Dunmore, H. Fergani, N.W. Tanner, K. Kazkaz, W. B. Handler, R. J. Ford, G. Jonkmans, A. P. Ferraris, J. X. Wang, S. J. M. Peeters, B. Aharmim, M. W.E. Smith, A. S. Hamer, Y. I. Tserkovnyak, J. F. Wilkerson, K. McFarlane, T. J. Walker, R. MacLellan, G. McGregor, G. Prior, M. Bercovitch, J. A. Formaggio, Reda Tafirout, Darren Grant, Benjamin Monreal, C. Jillings, C. A. Duba, B. Jamieson, N. West, Q. R. Ahmad, N. Tagg, E. D. Earle, B. L. Wall, F. Dalnoki-Veress, V. L. Rusu, G. Milton, W. F. Davidson, W. J. Heintzelman, J. Boger, H. W. Lee, P. T. Trent, R. G. Stokstad, C. J. Virtue, R. L. Hahn, H. Mes, Salvador Gil, J. A. Secrest, J. C. Barton, I. T. Lawson, H. S. Ng, T. Tsui, R. J. Boardman, L. C. Stonehill, P. Jagam, J. G. Hykaway, G. A. Cox, J. D. Anglin, Minfang Yeh, K. T. Lesko, M. C.P. Isaac, M. DiMarco, L. L. Kormos, Steven Elliott, F. M. Newcomer, S. D. Reitzner, S. N. Ahmed, Keith Rielage, T. J. Bowles, Monica Dunford, J. Maneira, A. Krüger, R. G. Van de Water, Peter Wittich, J. T.M. Goon, A. W. P. Poon, T. V. Bullard, B. C. Robertson, M. Moorhead, J. Cameron, J. C. Loach, N. A. Jelley, M. Thorman, H. M. O'Keeffe, G. Doucas, Yuen-Dat Chan, R. W. Ollerhead, M. Kos, X. Chen, J. Lyon, J. B. Wilhelmy, K. Graham, S. M. Oser, E. D. Hallman, T. Kutter, R. Meijer Drees, A. Schülke, A. L. Hallin, C. Mifflin, H. Wan Chan Tseung, G. T. Ewan, J. H.M. Cowan, R. K. Taplin, E. W. Beier, John L. Orrell, R. S. Storey, S. D. Biller, H. Labranche, Bernie G. Nickel, M.G. Boulay, D. L. Wark, J. Bigu, B. Morrissette, S. J. Brice, C. Kraus, I. Levine, A. Goldschmidt, P. J. Harvey, N. Tolich, S. S.E. Rosendahl, J. R. Leslie, B. A. Moffat, P. M. Thornewell, A. D. Marino, J. M. Wouters, Hal Evans, M. Lay, Reyco Henning, Y. Takeuchi, C. K. Hargrove, K. K.S. Miknaitis, M. R. Dragowsky, E. Guillian, T. C. Andersen, P. T. Keener, H. B. Mak, A. B. McDonald, H. Seifert, Christopher C. M. Kyba, N. Gagnon, J. J. Simpson, Klaus Kirch, E. Saettler, C. E. Okada, J. D. Hepburn, E. D. Frank, Herbert H. Chen, N. Starinsky, P. J. Doe, M. H. Schwendener, E. Bonvin, David A. Sinclair, S. McGee, J. Heise, F. Fleurot, S. Luoma, R. J. Komar, R. C. Allen, H. Heron, A. Roberge, P. Skensved, H. Deng, D. S. McDonald, D. F. Cowen, J. Law, V. M. Novikov, C. J. Sims, J. V. Germani, I. Blevis, M. Omori, J. Hewett, Andrew Hime, Kai Zuber, C. D. Tunnell, X. Dai, R. Lange, Mark Neubauer, M. G. Bowler, M. C. Browne, R. L. Helmer, M. Shatkay, C. Howard, C. W. Nally, J. Farine, Alan R. Smith, A. J. Noble, T.H. Burritt, G. Bühler, R. A. Black, J. K. Rowley, Joshua R. Klein, R. A. Ott, W. Locke, B. T. Cleveland, W. Frati, J. R. Wilson, A. B. Knox, Bhaskar Sur, Richard T. Kouzes, M. Bergevin, N. McCauley, C. A. Currat, R. Van Berg, K. Frame, E. B. Norman, K. M. Heeger, A. Wright, R. D. Martin, R. G. H. Robertson, T. D. Steiger, Chris Waltham, M. L. Chen, A. A. Hamian, Ryuta Hazama, M. L. Miller, S. Majerus, and M. A. Howe
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, Particle physics, Neutral current, 010308 nuclear & particles physics, Solar neutrino, media_common.quotation_subject, Cosmic ray, 01 natural sciences, 7. Clean energy, Asymmetry, Nuclear physics, 13. Climate action, 0103 physical sciences, Neutrino, 010306 general physics, Charged current, media_common
Abstract: This article provides the complete description of resultsfrom the Phase I data set of the Sudbury Neutrino Observatory (SNO). ThePhase I data set is based on a 0.65 kt-year exposure of heavy water tothe solar 8B neutrino flux. Included here are details of the SNO physicsand detector model, evaluations of systematic uncertainties, andestimates of backgrounds. Also discussed are SNO's approach tostatistical extraction of the signals from the three neutrino reactions(charged current, neutral current, and elastic scattering) and theresults of a search for a day-night asymmetry in the ?e flux. Under theassumption that the 8B spectrum is undistorted, the measurements fromthis phase yield a solar ?e flux of ?(?e) =1.76+0.05?0.05(stat.)+0.09?0.09 (syst.) x 106 cm?2 s?1, and a non-?ecomponent ?(? mu) = 3.41+0.45?0.45(stat.)+0.48?0.45 (syst.) x 106 cm?2s?1. The sum of these components provides a total flux in excellentagreement with the predictions of Standard Solar Models. The day-nightasymmetry in the ?e flux is found to be Ae = 7.0 +- 4.9 (stat.)+1.3?1.2percent (sys.), when the asymmetry in the total flux is constrained to bezero.
Published: 2007

23. A search for neutrinos from the solar hep reaction and the diffuse supernova neutrino background with the Sudbury Neutrino Observatory

Author: S. N. Ahmed, Hal Evans, J. Wendland, A. L. Hallin, C. Mifflin, J. M. Wouters, F. Fleurot, L. L. Kormos, H. Wan Chan Tseung, A. E. Anthony, S. Luoma, H. Labranche, D. L. Wark, G. T. Ewan, R. G. Stokstad, Benjamin Monreal, E. D. Earle, Alain Bellerive, T. Tsui, A. D. Marino, Keith Rielage, F. Dalnoki-Veress, M. DiMarco, P. Jagam, B. C. Robertson, A. Krüger, R. G. Van de Water, G. Doucas, Yuen-Dat Chan, K. Graham, N. Gagnon, J. A. Secrest, I. T. Lawson, S. M. Oser, Joseph A. Formaggio, X. Chen, D. Waller, G. A. Cox, B. L. Wall, R. Hazama, A. Wright, Minfang Yeh, T. Kutter, R. A. Ott, R. J. Ford, P. Skensved, O. Simard, G. D. Orebi Gann, J. C. Loach, N. A. Jelley, B. Aharmim, H. Fergani, R. MacLellan, G. Prior, L. C. Stonehill, H. M. O'Keeffe, H. Deng, C. B. Krauss, N. S. Oblath, S. D. Biller, Bernie G. Nickel, J. R. Wilson, Reyco Henning, R. D. Martin, E. B. Norman, X. Dai, T. J. Walker, M.G. Boulay, R. G. H. Robertson, C. J. Virtue, J. A. Detwiler, M. A. Howe, P. J. Harvey, R. Lange, M. Huang, K. M. Heeger, J. Tm. Goon, N. Tolich, F. A. Duncan, G. Tešić, C. Kraus, J. R. Leslie, B. T. Cleveland, B.A. VanDevender, E. D. Hallman, J. F. Wilkerson, C. Howard, J. Farine, P. J. Doe, A. J. Noble, Joshua R. Klein, J. Heise, J. A. Dunmore, K.K.S. Miknaitis, S. McGee, H. B. Mak, M. Bergevin, N. McCauley, C. A. Currat, R. Van Berg, C. E. Okada, David A. Sinclair, M. L. Chen, S. R. Seibert, S. Majerus, R. L. Helmer, Monica Dunford, J. Maneira, A. W. P. Poon, S. J. M. Peeters, Andrew Hime, M. L. Miller, M. H. Schwendener, F. Zhang, J. Law, P.-L. Drouin, C. J. Sims, Kai Zuber, R. L. Hahn, Christopher C. M. Kyba, E. Rollin, R. J. Hemingway, M. Kos, A. B. McDonald, E. W. Beier, N. West, W. J. Heintzelman, K. T. Lesko, and E. Guillian
Subjects: Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Astrophysics (astro-ph), Astronomy and Astrophysics, Solar neutrino problem, Neutrino detector, 13. Climate action, Space and Planetary Science, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Lepton
Abstract: A search has been made for neutrinos from the hep reaction in the Sun and from the diffuse supernova neutrino background (DSNB) using data collected during the first operational phase of the Sudbury Neutrino Observatory, with an exposure of 0.65 kilotonne-years. For the hep neutrino search, two events are observed in the effective electron energy range of 14.3 MeV, Comment: 12 pages, 5 figures, accepted for publication by ApJ. Minor updates to address referees comments
Published: 2006
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24. Electron energy spectra, fluxes, and day-night asymmetries of8B solar neutrinos from measurements with NaCl dissolved in the heavy-water detector at the Sudbury Neutrino Observatory

Author: B. Aharmim, S. N. Ahmed, A. E. Anthony, E. W. Beier, A. Bellerive, M. Bergevin, S. D. Biller, J. Boger, M. G. Boulay, M. G. Bowler, T. V. Bullard, Y. D. Chan, M. Chen, X. Chen, B. T. Cleveland, G. A. Cox, C. A. Currat, X. Dai, F. Dalnoki-Veress, H. Deng, P. J. Doe, R. S. Dosanjh, G. Doucas, C. A. Duba, F. A. Duncan, M. Dunford, J. A. Dunmore, E. D. Earle, S. R. Elliott, H. C. Evans, G. T. Ewan, J. Farine, H. Fergani, F. Fleurot, J. A. Formaggio, K. Frame, W. Frati, B. G. Fulsom, N. Gagnon, K. Graham, D. R. Grant, R. L. Hahn, J. C. Hall, A. L. Hallin, E. D. Hallman, W. B. Handler, C. K. Hargrove, P. J. Harvey, R. Hazama, K. M. Heeger, L. Heelan, W. J. Heintzelman, J. Heise, R. L. Helmer, R. J. Hemingway, A. Hime, C. Howard, M. A. Howe, M. Huang, P. Jagam, N. A. Jelley, J. R. Klein, L. L. Kormos, M. S. Kos, A. Krüger, C. Kraus, C. B. Krauss, A. V. Krumins, T. Kutter, C. C. M. Kyba, H. Labranche, R. Lange, J. Law, I. T. Lawson, K. T. Lesko, J. R. Leslie, I. Levine, J. C. Loach, S. Luoma, R. MacLellan, S. Majerus, H. B. Mak, J. Maneira, A. D. Marino, N. McCauley, A. B. McDonald, S. McGee, G. McGregor, C. Mifflin, K. K. S. Miknaitis, B. A. Moffat, C. W. Nally, M. S. Neubauer, B. G. Nickel, A. J. Noble, E. B. Norman, N. S. Oblath, C. E. Okada, R. W. Ollerhead, J. L. Orrell, S. M. Oser, C. Ouellet, S. J. M. Peeters, A. W. P. Poon, K. Rielage, B. C. Robertson, R. G. H. Robertson, E. Rollin, S. S. E. Rosendahl, V. L. Rusu, M. H. Schwendener, S. R. Seibert, O. Simard, J. J. Simpson, C. J. Sims, D. Sinclair, P. Skensved, M. W. E. Smith, N. Starinsky, R. G. Stokstad, L. C. Stonehill, R. Tafirout, Y. Takeuchi, G. Tešić, M. Thomson, M. Thorman, T. Tsui, R. Van Berg, R. G. Van de Water, C. J. Virtue, B. L. Wall, D. Waller, C. E. Waltham, H. Wan Chan Tseung, D. L. Wark, J. Wendland, N. West, J. F. Wilkerson, J. R. Wilson, P. Wittich, J. M. Wouters, A. Wright, M. Yeh, and K. Zuber
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Solar neutrino, Isotopes of boron, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, 13. Climate action, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Neutrino, 010306 general physics, Neutrino oscillation, Lepton
Abstract: Results are reported from the complete salt phase of the Sudbury Neutrino Observatory experiment in which NaCl was dissolved in the {sup 2}H{sub 2}O (''D{sub 2}O'') target. The addition of salt enhanced the signal from neutron capture as compared to the pure D{sub 2}O detector. By making a statistical separation of charged-current events from other types based on event-isotropy criteria, the effective electron recoil energy spectrum has been extracted. In units of 10{sup 6}cm{sup -2}s{sup -1}, the total flux of active-flavor neutrinos from {sup 8}B decay in the Sun is found to be 4.94{sub -0.21}{sup +0.21}(stat){sub -0.34}{sup +0.38}(syst) and the integral flux of electron neutrinos for an undistorted {sup 8}B spectrum is 1.68{sub -0.06}{sup +0.06}(stat){sub -0.09}{sup +0.08}(syst); the signal from ({nu}{sub x},e) elastic scattering is equivalent to an electron-neutrino flux of 2.35{sub -0.22}{sup +0.22}(stat){sub -0.15}{sup +0.15}(syst). These results are consistent with those expected for neutrino oscillations with the so-called large mixing angle parameters and also with an undistorted spectrum. A search for matter-enhancement effects in the Earth through a possible day-night asymmetry in the charged-current integral rate is consistent with no asymmetry. Including results from other experiments, the best-fit values for two-neutrino mixing parameters are {delta}m{sup 2}=(8.0{sub -0.4}{sup +0.6})x10{sup -5}more » eV{sup 2} and {theta}=33.9{sub -2.2}{sup +2.4} degrees.« less
Published: 2005

25. Search for periodicities in theB8solar neutrino flux measured by the Sudbury Neutrino Observatory

Author: B. Aharmim, S. N. Ahmed, A. E. Anthony, E. W. Beier, A. Bellerive, M. Bergevin, S. D. Biller, M. G. Boulay, M. G. Bowler, Y. D. Chan, M. Chen, X. Chen, B. T. Cleveland, T. Costin, G. A. Cox, C. A. Currat, X. Dai, H. Deng, J. Detwiler, P. J. Doe, R. S. Dosanjh, G. Doucas, C. A. Duba, F. A. Duncan, M. Dunford, J. A. Dunmore, E. D. Earle, S. R. Elliott, H. C. Evans, G. T. Ewan, J. Farine, H. Fergani, F. Fleurot, J. A. Formaggio, W. Frati, B. G. Fulsom, N. Gagnon, J. TM. Goon, K. Graham, R. L. Hahn, A. L. Hallin, E. D. Hallman, W. B. Handler, C. K. Hargrove, P. J. Harvey, R. Hazama, K. M. Heeger, L. Heelan, W. J. Heintzelman, J. Heise, R. L. Helmer, R. J. Hemingway, A. Hime, M. A. Howe, M. Huang, E. Inrig, P. Jagam, N. A. Jelley, J. R. Klein, L. L. Kormos, M. S. Kos, A. Krüger, C. Kraus, C. B. Krauss, A. V. Krumins, T. Kutter, C. C. M. Kyba, H. Labranche, R. Lange, J. Law, I. T. Lawson, K. T. Lesko, J. R. Leslie, I. Levine, J. C. Loach, S. Luoma, R. MacLellan, S. Majerus, J. Maneira, A. D. Marino, N. McCauley, A. B. McDonald, S. McGee, C. Mifflin, K. K. S. Miknaitis, B. G. Nickel, A. J. Noble, E. B. Norman, N. S. Oblath, C. E. Okada, H. M. O’Keeffe, R. W. Ollerhead, G. D. Orebi Gann, J. L. Orrell, S. M. Oser, T. Ouvarova, S. J. M. Peeters, A. W. P. Poon, C. S. J. Pun, K. Rielage, B. C. Robertson, R. G. H. Robertson, E. Rollin, S. S. E. Rosendahl, M. H. Schwendener, S. R. Seibert, O. Simard, J. J. Simpson, C. J. Sims, D. Sinclair, L. Sinclair, P. Skensved, M. W. E. Smith, R. G. Stokstad, L. C. Stonehill, R. Tafirout, Y. Takeuchi, G. Tešić, M. Thomson, K. V. Tsang, T. Tsui, R. Van Berg, C. J. Virtue, B. L. Wall, D. Waller, C. E. Waltham, H. Wan Chan Tseung, D. L. Wark, J. Wendland, N. West, J. F. Wilkerson, J. R. Wilson, J. M. Wouters, M. Yeh, and K. Zuber
Subjects: Physics, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Flux, Astrophysics, Solar neutrino problem, 01 natural sciences, Radiation flux, Neutrino detector, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Lepton
Abstract: A search has been made for sinusoidal periodic variations in the 8B solar neutrino flux using data collected by the Sudbury Neutrino Observatory over a 4-year time interval. The variation at a period of 1 yr is consistent with modulation of the 8B neutrino flux by the Earth's orbital eccentricity. No significant sinusoidal periodicities are found with periods between 1 d and 10 years with either an unbinned maximum likelihood analysis or a Lomb-Scargle periodogram analysis. The data are inconsistent with the hypothesis that the results of the recent analysis by Sturrock et al., based on elastic scattering events in Super-Kamiokande, can be attributed to a 7% sinusoidal modulation of the total 8B neutrino flux.
Published: 2005

26. Electron antineutrino search at the Sudbury Neutrino Observatory

Author: S. M. Oser, S. J. M. Peeters, R. W. Ollerhead, V. L. Rusu, B. A. Moffat, Xiaobo Chen, M.G. Boulay, R. L. Helmer, J. A. Dunmore, K.K.S. Miknaitis, Monica Dunford, A. W. P. Poon, S. D. Biller, J. Boger, C. E. Okada, G. Doucas, David A. Sinclair, T. V. Bullard, P. Skensved, J. F. Wilkerson, L. C. Stonehill, N. McCauley, A. L. Hallin, C. Mifflin, Reda Tafirout, R. Van Berg, Darren Grant, P. J. Harvey, S. J. Brice, B. G. Fulsom, C. B. Krauss, N. S. Oblath, M. L. Chen, M. A. Howe, E. D. Hallman, H. Fergani, S. N. Ahmed, G. McGregor, S. S.E. Rosendahl, M. A. Thomson, J. Heise, M. R. Dragowsky, T. J. Bowles, P. J. Doe, R. G. Stokstad, C. K. Hargrove, F. Fleurot, S. Luoma, Malcolm M. Fowler, X. Dai, G. Tešić, I. Levine, S. Majerus, Keith Rielage, A. B. McDonald, Christopher C. M. Kyba, P. Jagam, C. J. Virtue, Joshua R. Klein, R. Lange, Mark Neubauer, B. G. Nickel, A. Krüger, R. G. Van de Water, N. Starinsky, Hal Evans, W. Frati, D. Waller, H. B. Mak, M. S. Kos, A. S. Hamer, W. B. Handler, R. MacLellan, R. L. Hahn, Guthrie Miller, Y. Takeuchi, O. Simard, E. D. Earle, Peter Wittich, B. Aharmim, M. W.E. Smith, F. A. Duncan, S. McGee, B. L. Wall, T. Tsui, J. M. Wouters, J. J. Simpson, C. Ouellet, Eric B. Norman, J. R. Leslie, C. A. Duba, B. C. Robertson, B. T. Cleveland, I. T. Lawson, L. L. Kormos, S. R. Elliott, J. B. Wilhelmy, T. Kutter, G. T. Ewan, G. A. Cox, R. J. Hemingway, N. Gagnon, R. Hazama, C. W. Nally, E. W. Beier, R. S. Dosanjh, E. Rollin, N. West, A. V. Krumins, W. J. Heintzelman, K. T. Lesko, H. Wan Chan Tseung, J. Maneira, H. Labranche, Alain Bellerive, D. L. Wark, Chris Waltham, F. Dalnoki-Veress, A. D. Marino, R. G. H. Robertson, Joseph A. Formaggio, J. Farine, Minfang Yeh, A. J. Noble, J. R. Wilson, N. A. Jelley, Andrew Hime, M. H. Schwendener, J. Law, C. J. Sims, John L. Orrell, Kai Zuber, K. Frame, K. M. Heeger, Yuen-Dat Chan, and K. Graham
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Flux, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Neutron, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Nuclear Experiment, Lepton, Bar (unit)
Abstract: Upper limits on the \nuebar flux at the Sudbury Neutrino Observatory have been set based on the \nuebar charged-current reaction on deuterium. The reaction produces a positron and two neutrons in coincidence. This distinctive signature allows a search with very low background for \nuebar's from the Sun and other potential sources. Both differential and integral limits on the \nuebar flux have been placed in the energy range from 4 -- 14.8 MeV. For an energy-independent ��_e --> \nuebar conversion mechanism, the integral limit on the flux of solar \nuebar's in the energy range from 4 -- 14.8 MeV is found to be ��_\nuebar, submitted to Phys. Rev. D
Published: 2004

27. Measurement of the Total ActiveB8Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity

Author: R. L. Helmer, P. J. Doe, R. L. Hahn, Monica Dunford, A. W. P. Poon, R. MacLellan, S. R. Elliott, R. W. Ollerhead, E. D. Hallman, G. T. Ewan, J. Maneira, I. T. Lawson, W. B. Handler, Y. Takeuchi, J. F. Wilkerson, J. Boger, J. J. Simpson, D. Waller, Reda Tafirout, Darren Grant, Christopher C. M. Kyba, Yuen-Dat Chan, B. L. Wall, C. K. Hargrove, P. Skensved, C. E. Okada, David A. Sinclair, G. A. Cox, Eric B. Norman, F. A. Duncan, R. S. Dosanjh, B. A. Moffat, K. Graham, E. Rollin, J. R. Leslie, M. W.E. Smith, B. T. Cleveland, J. M. Wouters, R. G. Stokstad, Chris Waltham, M. A. Howe, Malcolm M. Fowler, C. Ouellet, S. M. Oser, H. Fergani, Guthrie Miller, J. A. Dunmore, J. Farine, A. J. Noble, X. Chen, X. Dai, G. Tešić, N. West, A. V. Krumins, R. Lange, S. J. M. Peeters, V. L. Rusu, K.K.S. Miknaitis, W. J. Heintzelman, M.G. Boulay, S. J. Brice, A. S. Hamer, K. T. Lesko, G. McGregor, A. L. Hallin, J. R. Wilson, C. Mifflin, T. V. Bullard, R. J. Hemingway, S. McGee, M. Kos, E. D. Earle, S. D. Biller, Bernie G. Nickel, H. Wan Chan Tseung, I. Levine, N. S. Oblath, E. W. Beier, C. A. Duba, H. Labranche, A. B. McDonald, D. L. Wark, M. R. Dragowsky, F. Dalnoki-Veress, M. H. Schwendener, M. G. Bowler, A. D. Marino, B. G. Fulsom, J. C. Hall, J. Law, R. G. H. Robertson, C. J. Sims, Kai Zuber, C. W. Nally, Andrew Hime, B. C. Robertson, G. Doucas, J. B. Wilhelmy, T. Kutter, C. J. Virtue, N. Gagnon, John L. Orrell, L. C. Stonehill, S. N. Ahmed, R. Hazama, T. J. Bowles, Joseph A. Formaggio, N. McCauley, Minfang Yeh, N. A. Jelley, M. Thorman, R. Van Berg, O. Simard, Hal Evans, K. Frame, Alain Bellerive, K. M. Heeger, M. L. Chen, M. A. Thomson, J. Heise, F. Fleurot, A. E. Anthony, S. Luoma, P. Jagam, Joshua R. Klein, R. G. Van de Water, N. Starinsky, H. B. Mak, S. S.E. Rosendahl, P. J. Harvey, and S. Majerus
Subjects: Physics, Particle physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, General Physics and Astronomy, Flux, Cosmic ray, 7. Clean energy, 01 natural sciences, Nuclear physics, Neutrino detector, 13. Climate action, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Astrophysics::Galaxy Astrophysics, Lepton
Abstract: The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) B-8 solar neutrino flux without assumptions about the energy dependence of the nu(e) survival probability. The measurements were made with dissolved NaCl in heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21+/-0.27(stat)+/-0.38(syst)x10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Deltam(2)=7.1(-0.6)(+1.2)x10(-5) eV(2) and theta= 32.5(-2.3)(+2.4) degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.
Published: 2004

28. Measurement of the total active 8B solar neutrino flux at the Sudbury Neutrino Observatory with enhanced neutral current sensitivity

Author: S N, Ahmed, A E, Anthony, E W, Beier, A, Bellerive, S D, Biller, J, Boger, M G, Boulay, M G, Bowler, T J, Bowles, S J, Brice, T V, Bullard, Y D, Chan, M, Chen, X, Chen, B T, Cleveland, G A, Cox, X, Dai, F, Dalnoki-Veress, P J, Doe, R S, Dosanjh, G, Doucas, M R, Dragowsky, C A, Duba, F A, Duncan, M, Dunford, J A, Dunmore, E D, Earle, S R, Elliott, H C, Evans, G T, Ewan, J, Farine, H, Fergani, F, Fleurot, J A, Formaggio, M M, Fowler, K, Frame, B G, Fulsom, N, Gagnon, K, Graham, D R, Grant, R L, Hahn, J C, Hall, A L, Hallin, E D, Hallman, A S, Hamer, W B, Handler, C K, Hargrove, P J, Harvey, R, Hazama, K M, Heeger, W J, Heintzelman, J, Heise, R L, Helmer, R J, Hemingway, A, Hime, M A, Howe, P, Jagam, N A, Jelley, J R, Klein, M S, Kos, A V, Krumins, T, Kutter, C C M, Kyba, H, Labranche, R, Lange, J, Law, I T, Lawson, K T, Lesko, J R, Leslie, I, Levine, S, Luoma, R, MacLellan, S, Majerus, H B, Mak, J, Maneira, A D, Marino, N, McCauley, A B, McDonald, S, McGee, G, McGregor, C, Mifflin, K K S, Miknaitis, G G, Miller, B A, Moffat, C W, Nally, B G, Nickel, A J, Noble, E B, Norman, N S, Oblath, C E, Okada, R W, Ollerhead, J L, Orrell, S M, Oser, C, Ouellet, S J M, Peeters, A W P, Poon, B C, Robertson, R G H, Robertson, E, Rollin, S S E, Rosendahl, V L, Rusu, M H, Schwendener, O, Simard, J J, Simpson, C J, Sims, D, Sinclair, P, Skensved, M W E, Smith, N, Starinsky, R G, Stokstad, L C, Stonehill, R, Tafirout, Y, Takeuchi, G, Tesić, M, Thomson, M, Thorman, R, Van Berg, R G, Van de Water, C J, Virtue, B L, Wall, D, Waller, C E, Waltham, H Wan Chan, Tseung, D L, Wark, N, West, J B, Wilhelmy, J F, Wilkerson, J R, Wilson, J M, Wouters, M, Yeh, and K, Zuber
Abstract: The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) 8B solar neutrino flux without assumptions about the energy dependence of the nu(e) survival probability. The measurements were made with dissolved NaCl in heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21 +/- 0.27(stat)+/-0.38(syst) x 10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Deltam(2)=7.1(+1.2)(-0.6) x 10(-5) eV(2) and theta=32.5(+2.4)(-2.3) degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.
Published: 2004

29. Photon asymmetry measurement in radiative muon capture on40Ca

Author: T.P. Gorringe, A. J. Noble, C.J. Virtue, B. C. Robertson, A. J. Larabee, A. Pouladdej, D. H. Wright, Georges Azuelos, and M. D. Hasinoff
Subjects: Coupling constant, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Muon, media_common.quotation_subject, Asymmetry, Muon capture, Pseudoscalar, Crystal, Radiative transfer, Atomic physics, media_common
Abstract: A measurement of the photon asymmetry $({\ensuremath{\alpha}}_{\ensuremath{\gamma}})$ in radiative muon capture RMC on ${}^{40}\mathrm{Ca}$ has been carried out at TRIUMF. Negative muons were stopped in a ${}^{40}\mathrm{Ca}$ target and the resulting RMC photons were then converted by a 5-cm thick NaI detector placed immediately in front of our main NaI detector, a cylindrical crystal of diameter 46 cm and depth 51 cm. The data sample consisted of 5200 high-energy $(57\mathrm{MeV}l{E}_{\ensuremath{\gamma}}l95\mathrm{MeV})$ RMC photon candidates. Our measured value for the energy-averaged photon asymmetry is ${\ensuremath{\alpha}}_{\ensuremath{\gamma}}=1.00\ifmmode\pm\else\textpm\fi{}0.23.$ The extracted values for the induced pseudoscalar coupling constant ${(g}_{P})$ based on this photon asymmetry measurement are ${g}_{P}{/g}_{A}l8.0,$ utilizing the impulse approximation IA model, and ${g}_{P}{/g}_{A}l14.5$ in terms of the modified impulse approximation (MIA) model. The two extracted values, although both consistent with the Goldberger-Treiman value of ${g}_{P}{/g}_{A}\ensuremath{\approx}7,$ are considerably different, indicating a significant theoretical model dependency.
Published: 2003

30. Direct evidence for neutrino flavor transformation from neutral-current interactions in the Sudbury Neutrino Observatory

Author: D. S. McDonald, E. D. Earle, J. A. Dunmore, R. U. Haq, Christopher C. M. Kyba, M. C.P. Isaac, V. M. Novikov, T. J. Bowles, G. Jonkmans, E. Saettler, H. Fergani, J. R. Wilson, G. Doucas, E. D. Hallman, M. H. Schwendener, E. Bonvin, R. Hazama, Herbert H. Chen, A. B. Knox, N. McCauley, P. J. Doe, J. Law, P. Jagam, N. W. Tanner, C. J. Sims, J. V. Germani, A. Roberge, H. Heron, A. L. Hallin, R. Van Berg, C. Mifflin, J. B. Wilhelmy, P. T. Trent, H. W. Lee, Joseph A. Formaggio, M. R. Dragowsky, M. M. Fowler, S. D. Biller, J. Hewett, T. V. Bullard, Andrew Hime, T. D. Steiger, R. K. Taplin, M. C. Browne, Minfang Yeh, M. L. Chen, R. L. Hahn, Salvador Gil, K. Kazkaz, A. A. Hamian, J. Farine, G. T. Ewan, K. K. Schaffer, N. A. Jelley, N. West, E. W. Beier, Hal Evans, S. S.E. Rosendahl, E. T.H. Clifford, F.M. Newcomer, M. Lay, R. A. Black, F. A. Duncan, J. D. Anglin, P. J. Harvey, Yuen-Dat Chan, S. J. Brice, K. Graham, D. F. Cowen, C. E. Okada, J. D. Hepburn, R. G. H. Robertson, T. C. Andersen, Steven Elliott, J. J. Simpson, Peter Wittich, David A. Sinclair, E.D. Frank, A. S. Hamer, S. M. Oser, R. G. Stokstad, L. C. Stonehill, J. Maneira, R. G. Van de Water, I. Levine, N. Starinsky, P. M. Thornewell, T. J. Radcliffe, K. Frame, S. Majerus, J. H.M. Cowan, T. Spreitzer, D. L. Wark, J. Cameron, W. J. Heintzelman, Chris Waltham, C. J. Virtue, M. O'Neill, M. Moorhead, R. J. Komar, R. C. Allen, K. T. Lesko, M.G. Boulay, Joshua R. Klein, K. McFarlane, N. Gagnon, K. M. Heeger, I. T. Lawson, W. Frati, John L. Orrell, J. M. Wouters, Bhaskar Sur, B. C. Robertson, F. Dalnoki-Veress, H. B. Mak, Richard T. Kouzes, Q. R. Ahmad, A. P. Ferraris, R. J. Boardman, A. D. Marino, Anett Schulke, J. Bigu, M. Bercovitch, J. X. Wang, P. T. Keener, T. Kutter, R. Meijer Drees, G. A. Cox, V. L. Rusu, A. B. McDonald, R. S. Storey, G. McGregor, M. A. Howe, R. W. Ollerhead, A. J. Noble, H. Seifert, J. Manor, Y. I. Tserkovnyak, J. Lyon, Eric B. Norman, J. Heise, C. K. Hargrove, S. Luoma, M. Thorman, N. Tagg, J. F. Wilkerson, Reda Tafirout, Darren Grant, B. A. Moffat, J. G. Hykawy, W. F. Davidson, J. C. Barton, R. L. Helmer, I. Blevis, M. Omori, Monica Dunford, A. W. P. Poon, R. J. Ford, Xin Chen, P. Skensved, G. Milton, X. Dai, H. S. Ng, Mark Neubauer, M. G. Bowler, W. Locke, J. R. Leslie, J. Boger, B. T. Cleveland, W. B. Handler, M. Shatkay, M. W.E. Smith, Alan R. Smith, C. W. Nally, G. Bühler, C. Jillings, J. K. Rowley, C. A. Duba, G. G. Miller, Développement et Communication Chimique chez les Insectes ( DCCI ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, and Delon, Viviane
Subjects: Particle physics, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Tau neutrino, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Solar neutrino problem, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Lepton
Abstract: Observations of neutral current neutrino interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current, elastic scattering, and charged current reactions and assuming the standard 8B shape, the electron-neutrino component of the 8B solar flux is 1.76 +/-0.05(stat.)+/-0.09(syst.) x10^6/(cm^2 s), for a kinetic energy threshold of 5 MeV. The non-electron neutrino component is 3.41+/-0.45(stat.)+0.48,-0.45(syst.) x10^6/(cm^2 s), 5.3 standard deviations greater than zero, providing strong evidence for solar electron neutrino flavor transformation. The total flux measured with the NC reaction is 5.09 +0.44,-0.43(stat.)+0.46,-0.43(syst.)x10^6/(cm^2 s), consistent with solar models., Comment: 6 pages, 3 figures, correction to author list and minor typographical corrections to references
Published: 2002

31. Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in SNO

Author: T. V. Bullard, M. H. Schwendener, B. C. Robertson, E. W. Beier, H. Fergani, G. Doucas, J. M. Wouters, H. W. Lee, J. Law, H. S. Ng, D. L. Wark, P. J. Doe, A. R. Smith, K. McFarlane, J. B. Wilhelmy, T. Kutter, Guthrie Miller, J.D. Anglin, A. S. Hamer, Q. R. Ahmad, C. J. Sims, J. V. Germani, M. Moorhead, R. Meijer Drees, J. Cameron, A. B. McDonald, H. Heron, F. Dalnoki-Veress, Min Chen, A. D. Marino, Christopher C. M. Kyba, John Heise, R. U. Haq, N. McCauley, K. Kazkaz, T. J. Radcliffe, R. G. H. Robertson, M. R. Dragowsky, E. Saettler, R. J. Boardman, T. Spreitzer, G. A. Cox, Andrew Hime, W. B. Handler, J.L. Hewett, Herbert H. Chen, Jochen Klein, Ilan Levine, C. J. Virtue, M. W.E. Smith, I. Lawson, N. Tagg, Anett Schulke, S. J. Brice, J. Bigu, Chris Waltham, A. J. Noble, Y. I. Tserkovnyak, R. L. Hahn, Salvador Gil, G. McGregor, J. G. Hykawy, Yuen-Dat Chan, A. P. Ferraris, J. X. Wang, E. D. Earle, A. L. Hallin, C. Mifflin, B. T. Cleveland, X. Chen, N.W. Tanner, K. Graham, L. C. Stonehill, S. M. Oser, J. Farine, Minfang Yeh, G. Jonkmans, N. West, V. L. Rusu, P. Skensved, M. Lay, R. K. Taplin, F. A. Duncan, J. H.M. Cowan, M. G. Boulay, W. J. Heintzelman, J. C. Barton, N. A. Jelley, M. Thorman, R. A. Black, M. O'Neill, J. J. Simpson, P. T. Keener, R. J. Ford, D. F. Cowen, Monica Dunford, J. Maneira, F. M. Newcomer, A. W. P. Poon, G. Bühler, J. A. Dunmore, A. Knox, P. T. Trent, R. W. Ollerhead, Peter Wittich, J. Lyon, M. C.P. Isaac, R. G. Stokstad, N. Gagnon, K. Frame, J. K. Rowley, B. A. Moffat, K. M. Heeger, I. Blevis, R. S. Storey, John L. Orrell, M. Omori, Joseph A. Formaggio, E. Bonvin, E. D. Hallman, R. Van Berg, W. Locke, A. Roberge, E. T.H. Clifford, J. Boger, T. J. Bowles, C. E. Okada, J. D. Hepburn, S. R. Elliott, David A. Sinclair, G. T. Ewan, T. D. Steiger, K. K. Schaffer, James R. Wilson, T. C. Andersen, A. A. Hamian, E.D. Frank, C. K. Hargrove, D. S. McDonald, X. Dai, V. M. Novikov, R. J. Komar, R. C. Allen, W. Frati, Bhaskar Sur, Mark Neubauer, Richard T. Kouzes, S. S.E. Rosendahl, Hal Evans, M. G. Bowler, M. C. Browne, Ryuta Hazama, R. L. Helmer, M. Bercovitch, S. Majerus, M. Shatkay, C. W. Nally, C. Jillings, C. A. Duba, H. B. Mak, W.F. Davidson, S. D. Biller, J. F. Wilkerson, Reda Tafirout, P. J. Harvey, Darren Grant, P. M. Thornewell, G. Milton, M. A. Howe, J. Manor, Malcolm M. Fowler, Eric B. Norman, H. Seifert, J. R. Leslie, P. Jagam, R. G. Van de Water, N. Starinsky, S. Luoma, and K. T. Lesko
Subjects: Physics, Particle physics, Sudbury Neutrino Observatory, Neutral current, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::Cosmology and Extragalactic Astrophysics, Solar neutrino problem, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Nuclear Experiment, Neutrino oscillation, Charged current
Abstract: The Sudbury Neutrino Observatory (SNO) is a 1,000 tonne heavy water Cerenkov‐based neutrino detector situated 2,000 meters underground in INCO’s Creighton Mine near Sudbury, Ontario, Canada. For the neutrinos from 8B decay in the Sun SNO observes the Charged Current neutrino reaction sensitive only to electron neutrinos and others (Neutral Current and Elastic Scattering) sensitive to all active neutrino types and thereby can search for direct evidence of neutrino flavor change. Using these reactions and assuming the standard 8B shape, the ve component of the 8B solar flux is φe = 1.76−0.05+0.05(stat.)−0.09+0.09 (syst.) × 106 cm−2s−1 for a kinetic energy threshold of 5 MeV. The non‐ve component is φμτ = 3.41−0.45+0.45(stat.)−0.45+0.48 (syst.) × 106 cm−2s−1, 5.3σ greater than zero, providing strong evidence for solar ve flavor transformation. The total flux measured with the NC reaction is φNC = 5.09−0.43+0.44(stat.)−0.43+0.46 (syst.) × 106 cm−2s−1, consistent with solar models. For charged current events, ...
Published: 2002

32. Measurement of day and night neutrino energy spectra at SNO and constraints on neutrino mixing parameters

Author: J. C. Barton, R. L. Helmer, Monica Dunford, A. W. P. Poon, M. Bercovitch, M. Lay, H. Fergani, J. J. Simpson, P. J. Doe, C. J. Virtue, J. A. Dunmore, R. W. Ollerhead, H. Heron, R. U. Haq, J. Lyon, E. D. Earle, B. A. Moffat, I. Levine, T. J. Radcliffe, G. T. Ewan, W. Locke, J. R. Leslie, B. C. Robertson, A. P. Ferraris, J. X. Wang, V. L. Rusu, K. K. Schaffer, S. D. Biller, A. S. Hamer, B. T. Cleveland, T. Kutter, R. Meijer Drees, N. Tagg, F. A. Duncan, R. J. Ford, P. J. Harvey, N. McCauley, M. C.P. Isaac, M. H. Schwendener, N. Gagnon, Xin Chen, E. Bonvin, R. Hazama, E. D. Hallman, A. J. Noble, R. Van Berg, H. S. Ng, P. M. Thornewell, T. D. Steiger, W. J. Heintzelman, M. L. Chen, A. Roberge, K. McFarlane, P. T. Trent, A. A. Hamian, D. F. Cowen, J. Law, C. J. Sims, Joshua R. Klein, J. V. Germani, D. L. Wark, R. G. Van de Water, N. Starinsky, K. T. Lesko, W. Frati, Q. R. Ahmad, Bhaskar Sur, F. Dalnoki-Veress, T. V. Bullard, P. T. Keener, H. B. Mak, A. D. Marino, I. T. Lawson, Richard T. Kouzes, Anett Schulke, J. Bigu, R. J. Boardman, G. A. Cox, E. W. Beier, M. G. Bowler, J. Heise, C. K. Hargrove, G. McGregor, S. Luoma, J. Boger, Y. I. Tserkovnyak, R. G. Stokstad, N.W. Tanner, D. S. McDonald, A. B. McDonald, M. Shatkay, L. C. Stonehill, J. K. Rowley, M. O'Neill, S. S.E. Rosendahl, G. G. Miller, H. W. Lee, V. M. Novikov, C. W. Nally, Christopher C. M. Kyba, Alan R. Smith, M. Moorhead, G. Jonkmans, E. Saettler, S. Majerus, J. Cameron, H. Seifert, Herbert H. Chen, G. Bühler, J. M. Wouters, E. T.H. Clifford, P. Jagam, C. E. Okada, J. D. Hepburn, M. A. Howe, David A. Sinclair, Yuen-Dat Chan, K. Graham, J. Hewett, S. M. Oser, A. L. Hallin, Andrew Hime, J. Manor, C. Mifflin, J. H.M. Cowan, J. Maneira, I. Blevis, R. L. Hahn, Salvador Gil, G. Doucas, M. Omori, M.G. Boulay, C. Jillings, J. F. Wilkerson, Eric B. Norman, J. R. Wilson, K. Frame, Reda Tafirout, Darren Grant, A. B. Knox, C. A. Duba, K. M. Heeger, Hal Evans, John L. Orrell, W. F. Davidson, J. Farine, R. A. Black, W. B. Handler, Joseph A. Formaggio, Minfang Yeh, N. A. Jelley, N. West, M. Thorman, M. W.E. Smith, M. M. Fowler, M. C. Browne, Steven Elliott, T. C. Andersen, E.D. Frank, R. S. Storey, J. G. Hykawy, R. J. Komar, R. C. Allen, P. Skensved, R. K. Taplin, T. J. Bowles, X. Dai, Mark Neubauer, Chris Waltham, G. Milton, R. G. H. Robertson, T. Spreitzer, F.M. Newcomer, J. D. Anglin, S. J. Brice, Peter Wittich, J. B. Wilhelmy, M. R. Dragowsky, K. Kazkaz, Delon, Viviane, Développement et Communication Chimique chez les Insectes ( DCCI ), and Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, FOS: Physical sciences, General Physics and Astronomy, Flux, Cosmic ray, Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Nuclear astrophysics, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Astrophysics::Galaxy Astrophysics, Charged current, Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics (astro-ph), High Energy Physics::Phenomenology, 13. Climate action, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino
Abstract: The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted $^8$B spectrum, the night minus day rate is $14.0% \pm 6.3% ^{+1.5}_{-1.4}%$ of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the $\nu_e$ asymmetry is found to be $7.0% \pm 4.9% ^{+1.3}_{-1.2}%$. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution., Comment: 5 pages, 4 figures; very minor revisions, accepted by Physical Review Letters
Published: 2002

33. Measurement of CC interactions produced by ${}^8$B solar neutrinos at SNO

Author: H. W. Lee, H. Mes, D. S. McDonald, John Heise, Ilan Levine, J. A. Dunmore, V. M. Novikov, R. U. Haq, Yuen-Dat Chan, J. F. Wilkerson, M. Moorhead, H. S. Ng, J. Cameron, Y. I. Tserkovnyak, Reda Tafirout, A. L. Hallin, E. T.H. Clifford, J. Boger, C. Mifflin, B. T. Cleveland, E. Bonvin, K. McFarlane, Darren Grant, N. Tagg, Christopher C. M. Kyba, C. E. Okada, J. D. Hepburn, S. M. Oser, David A. Sinclair, Hans C. Evans, T. V. Bullard, E. D. Earle, M. C.P. Isaac, R. W. Ollerhead, X. Chen, G. Milton, A. Roberge, N.W. Tanner, J. Lyon, Guthrie Miller, P. Skensved, H. B. Mak, I. Blevis, J. D. Anglin, E. D. Hallman, T. C. Andersen, E. W. Beier, J. H.M. Cowan, R. G. Stokstad, John L. Orrell, Q. R. Ahmad, F. M. Newcomer, C. J. Virtue, E. Saettler, E.D. Frank, Art Mc Donald, W.F. Davidson, Peter Wittich, P. J. Doe, P. Jagam, S. R. Elliott, M. Omori, Herbert H. Chen, G. T. Ewan, K. K. Schaffer, H. Heron, H. Fergani, J. Karn, Y. Dai, R. J. Ford, Klaus Kirch, D. L. Wark, B. A. Moffat, N. Starinsky, R. Heaton, F. A. Duncan, N. McCauley, C. K. Hargrove, J. C. Barton, B. C. Robertson, M. R. Dragowsky, R. K. Taplin, D. F. Cowen, M. G. Boulay, R. L. Hahn, Salvador Gil, F. Dalnoki-Veress, P. T. Trent, A. Goldschmidt, R. S. Storey, G. Doucas, A. S. Hamer, A. D. Marino, A. Knox, N. West, J. R. Leslie, S. D. Biller, R. J. Komar, R. C. Allen, M. W.E. Smith, M. Bercovitch, M. C. Chon, M. O'Neill, M. A. Howe, J. B. Wilhelmy, T. Kutter, R. Meijer Drees, Min Chen, P. J. Harvey, M. Lay, J. Bigu, S. J. Brice, G. McGregor, P. M. Thornewell, W. J. Heintzelman, R. J. Boardman, Richard George Van de Water, G. A. Cox, I. Lawson, T. J. Radcliffe, K. Frame, A. J. Noble, A. W. P. Poon, Malcolm M. Fowler, P. T. Keener, K. T. Lesko, J. J. Simpson, T. J. Bowles, K. M. Heeger, Eric B. Norman, G. Jonkmans, J. M. Wouters, H. Seifert, S. Luoma, A. Schuelke, Minfang Yeh, A. B. McDonald, N. A. Jelley, M. Thorman, A. P. Ferraris, J. X. Wang, V. L. Rusu, K. Cameron, J. G. Hykawy, J. Hewett, Andrew Hime, M. H. Schwendener, W. McLatchie, M. M. Lowry, J. Law, Jochen Klein, J. V. Germani, J. Farine, M. G. Bowler, M. C. Browne, T.H. Burritt, R. A. Black, G. Bühler, A. R. Smith, R. L. Helmer, W. Locke, J. K. Rowley, M. Shatkay, R. Van Berg, C. W. Nally, T. D. Steiger, A. A. Hamian, C. Jillings, Ryuta Hazama, Chris Waltham, S. Majerus, C. A. Duba, R. G. H. Robertson, W. Frati, Bhaskar Sur, Richard T. Kouzes, James R. Wilson, X. Dai, and Mark Neubauer
Subjects: Nuclear physics, Physics, Angular distribution, Solar neutrino, Neutrino oscillation, Charged current
Published: 2001

34. Measurement of the Rate ofνe+d→p+p+e−Interactions Produced byB8Solar Neutrinos at the Sudbury Neutrino Observatory

Author: G. Jonkmans, Y. Dai, J. M. Wouters, A. Goldschmidt, M. G. Bowler, J. Boger, M. Shatkay, John L. Orrell, R. G. Stokstad, C. W. Nally, P. Skensved, M. M. Fowler, J. C. Barton, X. Dai, M. C. Browne, Mark Neubauer, C. Jillings, C. A. Duba, B. C. Robertson, R. L. Helmer, Yuen-Dat Chan, P. Jagam, N. W. Tanner, A. L. Hallin, Chris Waltham, C. Mifflin, Steven Elliott, T. Kutter, J. B. Wilhelmy, H. W. Lee, R. Meijer Drees, R. K. Taplin, M. R. Dragowsky, S. M. Oser, K. Frame, R. U. Haq, N. McCauley, C. K. Hargrove, F.M. Newcomer, R. G. H. Robertson, J. D. Anglin, S. J. Brice, J. H.M. Cowan, C. J. Virtue, M. Moorhead, Peter Wittich, I. Blevis, T. C. Andersen, R. Heaton, S. Luoma, K. M. Heeger, F. A. Duncan, A. Schuelke, R. J. Ford, J. Cameron, M. Omori, R. S. Storey, M. A. Howe, Xin Chen, E.D. Frank, K. McFarlane, Minfang Yeh, N. A. Jelley, N. West, M. W.E. Smith, Q. R. Ahmad, Klaus Kirch, R. Van Berg, M. H. Schwendener, P. T. Trent, J. F. Wilkerson, Reda Tafirout, Mark Guy Boulay, Darren Grant, W. McLatchie, G. Milton, W. F. Davidson, J. Heise, J. G. Hykawy, H. Mes, E. T.H. Clifford, N. Tagg, H. S. Ng, J. Law, J. V. Germani, M. O'Neill, R. G. Van de Water, T. D. Steiger, N. Starinsky, R. J. Bardman, R. J. Komar, R. C. Allen, M. L. Chen, M. C. Chon, H. Seifert, J. Hewett, A. A. Hamian, Andrew Hime, J. Karn, I. T. Lawson, C. E. Okada, J. D. Hepburn, T. J. Bowles, W. Locke, J. R. Leslie, Eric B. Norman, David A. Sinclair, B. T. Cleveland, J. Bigu, G. McGregor, G. A. Cox, R. L. Hahn, Salvador Gil, K. Cameron, Alan R. Smith, J. R. Wilson, M. M. Lowry, H. Fergani, T.H. Burritt, J. A. Dunmore, G. Bühler, S. Majerus, S. D. Biller, Hal Evans, Joshua R. Klein, M. Lay, A. B. Knox, P. J. Harvey, D. S. McDonald, W. Frati, Bhaskar Sur, J. K. Rowley, A. S. Hamer, H. B. Mak, P. M. Thornewell, Richard T. Kouzes, J. J. Simpson, G. Doucas, V. M. Novikov, Y. I. Tserkovnyak, G. G. Miller, W. J. Heintzelman, E. D. Earle, P. T. Keener, K. T. Lesko, M. Thorman, J. Farine, M. C.P. Isaac, G. T. Ewan, K. K. Schaffer, R. A. Black, E. D. Hallman, E. Bonvin, A. B. McDonald, Christopher C. M. Kyba, R. Hazama, P. J. Doe, D. L. Wark, T. V. Bullard, A. Roberge, H. Heron, E. Saettler, E. W. Beier, F. Dalnoki-Veress, A. D. Marino, Herbert H. Chen, M. Bercovitch, D. F. Cowen, A. J. Noble, I. Levine, T. J. Radcliffe, A. W. P. Poon, A. P. Ferraris, J. X. Wang, V. L. Rusu, R. W. Ollerhead, J. Lyon, and B. A. Moffat
Subjects: Nuclear reaction, Physics, Particle physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Solar neutrino, General Physics and Astronomy, Flux, 01 natural sciences, 7. Clean energy, Nuclear physics, Massless particle, 13. Climate action, 0103 physical sciences, Neutrino, 010306 general physics, Charged current, Lepton
Abstract: Solar neutrinos from the decay of 8B have been detected at the Sudbury Neutrino Observatory (SNO) via the charged current (CC) reaction on deuterium and by the elastic scattering (ES) of electrons. The CC reaction is sensitive exclusively to νe, while the ES reaction also has a small sensitivity to νμ and ντ. The flux of νe from 8B decay measured by the CC reaction rate is φCC(ν e )=[1.75±0.07(stat.) −0.11 +0.12 (syst.)×0.05(theor.)]×106cm−2s−1. Assuming no flavor transformation, the flux inferred from the ES reaction rate is φES(ν x )=[2.39±0.34(stat.) −0.14 +0.16 (syst.)]×106cm−2s−1. Comparison of φCC(νe) to the Super-Kamiokande collaboration’s precision value of φES(νx) yields a 3.3σ difference, assuming the systematic uncertainties are normally distributed, providing evidence that there is a nonelectron flavor active neutrino component in the solar flux. The total flux of active 8B neutrinos is thus determined to be (5.44±0.99)×106 cm−2 s−1, in close agreement with the predictions of solar models.
Published: 2001

35. Recurrent Merkel cell carcinoma of the upper extremity

Author: S E, Metzinger, R S, Wolfer, J J, Disa, J E, Kupersmith, and B C, Robertson
Subjects: Carcinoma, Merkel Cell, Male, Skin Neoplasms, Elbow, Humans, Lymph Node Excision, Skin Transplantation, Neoplasm Recurrence, Local, Muscle, Skeletal, Ulnar Nerve, Aged, Follow-Up Studies, Median Nerve
Abstract: We report a case of recurrent Merkel cell carcinoma (MCC) of the upper extremity, treated aggressively with wide local excision, regional lymphadenectomy, and immediate reconstruction. Five years after surgery, there is no clinical or diagnostic evidence of locoregional recurrence or distant disease. The patient's upper extremity and hand remain fully functional, without evidence of median or ulnar nerve dysfunction. No donor site morbidity has been noted.
Published: 2000

36. High-energy ballistic and avulsive injuries. A management protocol for the next millennium

Author: B C, Robertson and P N, Manson
Subjects: Clinical Protocols, Skull Fractures, Skull, Humans, Maxillofacial Injuries, Wounds, Gunshot, Plastic Surgery Procedures, Facial Injuries, Facial Bones
Abstract: This article discusses high-energy ballistic and avulsive injuries, which are a formidable challenge to the reconstructive surgeon. Management protocols are provided for the next millennium.
Published: 2000

37. Microsatellite primers for studies of gene flow and mating systems in white-eyes (Zosterops)

Author: S M, Degnan, B C, Robertson, S M, Clegg, and C C, Moritz
Subjects: Songbirds, Genetics, Population, Base Sequence, Molecular Sequence Data, Animals, Genetic Variation, Alleles, DNA Primers, Microsatellite Repeats
Published: 1999

38. Radiative Muon Capture on Hydrogen and the Induced Pseudoscalar Coupling

Author: D. S. Armstrong, G. Jonkmans, B. C. Robertson, M. Munro, T. P. Gorringe, S. C. McDonald, D. G. Sample, P. Gumplinger, A. J. Larabee, M. D. Hasinoff, R. Poutissou, T. von Egidy, J. M. Poutissou, C. Q. Chen, W. Bertl, J. A. Macdonald, D. Healey, G. N. Taylor, E. Saettler, B. Doyle, N. S. Zhang, C. Sigler, P. Depommier, Georges Azuelos, Shama Ahmad, M. Blecher, and D.H. Wright
Subjects: Particle physics, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, Elementary particle, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Radiative transfer, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Coupling constant, Muon, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, 3. Good health, Muon capture, Pseudoscalar, High Energy Physics::Experiment, Lepton
Abstract: The first measurement of the elementary process $\mu^- p \rightarrow \nu_{\mu} n \gamma$ is reported. A photon pair spectrometer was used to measure the partial branching ratio ($2.10 \pm 0.22) \times 10^{-8}$ for photons of k > 60 MeV. The value of the weak pseudoscalar coupling constant determined from the partial branching ratio is $g_p(q^{2}=-0.88m_{\mu}^2) = (9.8 \pm 0.7 \pm 0.3) \cdot g_a(0)$, where the first error is the quadrature sum of statistical and systematic uncertainties and the second error is due to the uncertainty in $\lambda_{op}$, the decay rate of the ortho to para $p \mu p$ molecule. This value of g_p is $\sim$1.5 times the prediction of PCAC and pion-pole dominance., Comment: 13 pages, RevTeX type, 3 figures (encapsulated postscript), submitted to Phys. Rev. Lett
Published: 1996
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39. A prescription model for peritoneal dialysis

Author: B C, Robertson, N M, Juhasz, P J, Walker, K H, Raymond, T E, Taber, and A A, Adcock
Subjects: Adult, Male, Body Surface Area, Ultrafiltration, Biological Transport, Middle Aged, Kidney, Models, Biological, Absorption, Body Fluids, Lymphatic System, Prescriptions, Body Water, Clinical Protocols, Peritoneal Dialysis, Continuous Ambulatory, Glycosuria, Creatinine, Humans, Urea, Female, Peritoneal Cavity, Peritoneal Dialysis, Aged, Probability
Abstract: The authors have developed a mathematical model for peritoneal dialysis, based on the Popovich-Pyle-Moncrief approach, that is capable of predicting urea Kt/V and total weekly creatinine clearance for a variety of peritoneal dialysis therapies. This prescription model incorporates both diffusive and convective solute removal as well as ultrafiltration and lymphatic absorption. The primary input to the model is a single peritoneal equilibration test. Twenty-four hour dialysate collection is not required. Results from an extensive prospective clinical study performed with 100 patients at five dialysis centers indicate that the model is valid for predicting urea Kt/V and creatinine clearance for continuous ambulatory peritoneal dialysis and continuous cycling peritoneal dialysis. Predicted clearances agree with the clinical data from these patients to within an average difference of approximately 10%. This model promises to be a powerful tool to assist nephrologists in quantifying the amount of peritoneal dialysis delivered by a given prescription, tailoring it to individual patient needs, and investigating the potential efficacy of a variety of alternative therapies.
Published: 1995

40. Initial clinical experience with a new model of mass transfer for peritoneal dialysis

Author: P J, Walker, N M, Juhasz, T E, Taber, K H, Raymond, C A, DeSoi, C C, Walworth, N K, Wadhwa, J M, Lazarus, and B C, Robertson
Subjects: Adult, Male, Creatinine, Dialysis Solutions, Humans, Urea, Female, Pilot Projects, Middle Aged, Peritoneum, Models, Biological, Peritoneal Dialysis, Aged
Abstract: A clinical pilot study compared predictions of a new model of peritoneal dialysis mass transfer to measured weekly KT/V urea (KTu/V) and weekly creatinine clearance (Ccr) in liters per 1.73 m2 in 50 patients from five centers (40 CAPD, 10 CCPD). The Robertson et al. model is unique in that it does not require a 24-hour collection of dialysate. Instead, model predictions are based on the results of a standard 4-hour peritoneal equilibration test (PET) and appropriate demographic data. Analysis revealed 12 collection errors, 8 affecting the PET and 4 affecting 24-hour dialysate volume. PET drainage volume was low in six cases, excessive in two; 24-hour volume was incomplete in three, excessive in one. Similar errors were not found in the remaining 38 patients. In the 38 patients with correctly performed PET and dialysate collections, agreement between predicted and measured values was excellent.
Published: 1993

41. Radiative muon capture on Al, Si, Ca, Mo, Sn, and Pb

Author: D. G. Sample, R. Poutissou, A. J. Larabee, D. S. Armstrong, P. Depommier, J. A. Macdonald, Georges Azuelos, von Egidy T, B. C. Robertson, Shama Ahmad, W. Bertl, D. H. Wright, M. Blecher, Hasinoff, J. M. Poutissou, R.S. Henderson, G. N. Taylor, A. Serna-Angel, C. Q. Chen, S. C. McDonald, T. P. Gorringe, and N. S. Zhang
Subjects: Pseudoscalar, Physics, Nuclear reaction, Coupling constant, Nuclear and High Energy Physics, Branching fraction, Hadron, Analytical chemistry, Photon energy, Atomic physics, Spectral line, Muon capture
Abstract: The branching ratio for radiative muon capture (RMC), relative to the nonradiative process, is sensitive to {ital g}{sub {ital p}}, the induced pseudoscalar coupling constant of the weak hadronic current. The photon energy spectra from RMC on {sup 27}Al, {sup 28}Si, {sup 40}Ca, {sup nat}Mo, {sup nat}Sn, and {sup nat}Pb have been measured using a high-acceptance pair spectrometer. The measured partial branching ratios, {ital R}{sub {gamma}}, for photons of {ital E}{sub {gamma}}{gt}57 MeV are 1.43{plus minus}0.13, 1.93{plus minus}0.18, 2.09{plus minus}0.19, 1.11{plus minus}0.11, 0.98{plus minus}0.09, and 0.60{plus minus}0.07 respectively, in units of 10{sup {minus}5}. The results confirm the previously observed suppression of {ital R}{sub {gamma}} with increasing {ital Z} for {ital Z}{gt}20. For {sup 40}Ca the present result is in good agreement with previous measurements. For the heavier nuclei, the results are compared with two recent calculations performed in the Fermi-gas model. In one case the data indicate a complete quenching of {ital g}{sub {ital p}}, but the more recent calculation does not reproduce the data for any value of {ital g}{sub {ital p}}.
Published: 1992

42. A cylindrical pair spectrometer for the detection of medium energy photons

Author: D. H. Wright, Georges Azuelos, M. D. Hasinoff, Shama Ahmad, J. A. Macdonald, D. G. Sample, T. P. Gorringe, A. Serna-Angel, J. M. Poutissou, C. Q. Chen, B. C. Robertson, N. S. Zhang, D. S. Armstrong, Robert Henderson, M. Blecher, and R. Poutissou
Subjects: Physics, Nuclear physics, Range (particle radiation), Muon, Photon, Spectrometer, Physics::Instrumentation and Detectors, Radiative transfer, Photon energy, Nuclear Experiment, Particle detector, Muon capture
Abstract: A large acceptance, medium energy resolution, cylindrical drift chamber has been constructed for use as a pair spectrometer for the detection of 50 to 100 MeV photons from radiative muon capture. Energy resolution for the detection of 129 MeV photons was found to be 12% (FWHM) at a magnetic field of 2.4 kG and 5.5% at 7.1 kG with the resolution improving as the photon energy decreases. The worst case position resolution for particle tracks is 150 microns (σ). The acceptance for the detection of photons over the range 55–83 MeV was found to be 0.66% at 2.4 kG. All of these properties are reproduced by a Monte Carlo simulation of the spectrometer. Triggering schemes and further chamber characteristics will also be discussed.
Published: 1992

43. Radiative muon capture on carbon, oxygen, and calcium

Author: J. A. Macdonald, Shama Ahmad, R. Poutissou, A. J. Larabee, Georges Azuelos, M. Blecher, T. P. Gorringe, J. M. Poutissou, J. Summhammer, T. Numao, B. C. Robertson, M. D. Hasinoff, P. Depommier, E. T. H. Clifford, R. A. Burnham, D. H. Wright, H. Mes, D. S. Armstrong, and Chris Waltham
Subjects: Coupling constant, Nuclear reaction, Physics, Nuclear and High Energy Physics, Branching fraction, chemistry.chemical_element, Weak interaction, Photon energy, Calcium, Oxygen, Spectral line, Atomic and Molecular Physics, and Optics, Muon capture, Nuclear physics, Crystallography, chemistry, Radiative transfer, Atomic physics, Carbon
Abstract: The photon energy spectra from radiative muon capture on {sup 12}C, {sup 16}O, and {sup 40}Ca have been measured using a time projection chamber as a pair spectrometer. The branching ratio for radiative muon capture is sensitive to {ital g}{sub {ital p}}, the induced pseudoscalar coupling constant of the weak interaction. Expressed in terms of the axial-vector weak coupling constant {ital g}{sub {ital a}}, values of {ital g}{sub {ital p}}/{ital g}{sub {ital a}}=5.7{plus minus}0.8 and {ital g}{sub {ital p}}/{ital g}{sub {ital a}}=7.3{plus minus}0.9 are obtained for {sup 40}Ca and {sup 16}O, respectively, from comparison with phenomenological calculations of the nuclear response. From comparison with microscopic calculations, values of {ital g}{sub {ital p}}/{ital g}{sub {ital a}}=4.6{plus minus}1.8, 13.6{sub {minus}1.9}{sup +1.6}, and 16.2{sub {minus}0.7}{sup +1.3} for {sup 40}Ca, {sup 16}O, and {sup 12}C, respectively, are obtained. The microscopic results are suggestive of a renormalization of the nucleonic form factors within the nucleus.
Published: 1991

44. Effects of EPO therapy on backfiltration of dialysate in high flux dialysis

Author: B C, Robertson and C, Curtin
Subjects: Hematocrit, Dialysis Solutions, Animals, Humans, Cattle, Membranes, Artificial, Hemofiltration, Models, Theoretical, Erythropoietin, Blood Flow Velocity, Kidneys, Artificial, Recombinant Proteins
Abstract: The authors have developed a comprehensive mathematical model of the hemodialysis process to investigate the effect of r-HuEPO and the accompanying higher hematocrit on backfiltration in high flux dialysis. Model simulations indicate that under otherwise identical conditions typical of high flux dialysis, an increase in hematocrit from 20 to 33% will increase the amount of dialysate fluid entering the blood from 2.4 L to 3.8 L in a 4 hr treatment. We used the mathematical model to investigate the effect of the following variables on backfiltration: blood flow rate, ultrafiltration rate, inside fiber diameter, fiber length, and membrane permeability. While increasing the blood flow rate may enhance solute transport, it was found to increase backfiltration substantially through its effect on the axial pressure drop. This effect was most pronounced at the higher hematocrits due to the higher viscosity. It was found that increasing the fiber ID, decreasing the fiber length, and decreasing the permeability of the membrane (all at constant surface area) could be beneficial in reducing backfiltration. However, these results do not consider the potential negative impact of these changes on solute clearance. Finally, the mathematical model enhanced our understanding of the transport processes governing backfiltration. Due to protein concentration gradients in the lumen, protein osmotic pressures as high as 50-100 mmHg can be obtained in high-flux dialysis. As a result, providing an outlet hydrostatic blood pressure greater than the inlet hydrostatic dialysate pressure is not sufficient to guarantee the absence of backfiltration.
Published: 1990

45. Telomere length change in European sea bass (Dicentrarchus labrax).

Author: T. Horn, N. J. Gemmell, B. C. Robertson, and C. R. Bridges
Subjects: TELOMERES, EUROPEAN seabass, CHROMOSOME analysis, MARINE fishes, AGING, PHYSIOLOGICAL stress, BIOLOGICAL variation
Abstract: Telomeres, the repetitive sequences found at the end of chromosomes, are observed to shorten with age in birds and mammals, but to date no investigation on changes of telomere length has been made in long-lived marine fish during ageing. We have measured the telomere length of European sea bass (Dicentrarchus labrax) ranging in age from 12 to 94 months. No overall decrease of telomere length could be detected, but a broad range of intraspecies variation was observed. Telomere length change does not appear to be useful for estimating age in this species, but may prove a useful tool for examining individual fitness and response to stress. [ABSTRACT FROM AUTHOR]
Published: 2008
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46. A comparison of two independent measurements of the lifetime of a state in59Cu

Author: B. C. Robertson, B. E. Cooke, W. McLatchie, and J. R. Leslie
Subjects: Physics, Nuclear and High Energy Physics, Proton, Astrophysics::High Energy Astrophysical Phenomena, Attenuation, Gamma ray, General Physics and Astronomy, State (functional analysis), Resonance (particle physics), symbols.namesake, symbols, High Energy Physics::Experiment, Atomic physics, Spin (physics), Ion energy, Doppler effect
Abstract: Two states in 59Cu populated by the reaction 58Ni(p, gamma ) at proton energies of 3547 and 1833 keV have been studied. An investigation of the gamma ray transition between the resonance states and the gamma ray decay of the lower energy resonance has yielded Gamma gamma / Gamma =0.86+or-0.04 and (2J+1) Gamma gamma Gamma p/ Gamma =0.046+or-0.005 eV for the lower resonance. The spin of the lower resonance (Ex=5219 keV) has been deduced to be 9/2 and therefore the total width of the state is 0.038+or-0.009 eV, corresponding to a lifetime tau =17.5+or-4.1 fs. The Doppler shift attenuation method used to determine the lifetime of this state yields the values 13.5+or-2 fs and 16+or-2 fs. It is concluded that, within experimental error, there is agreement between observation and standard ion energy loss theory for the case of Cu recoiling in Ni.
Published: 1977

47. The 7/2− Doublet in 55Fe

Author: B. Castel, B. C. Robertson, and M. Micklinghoff
Subjects: Physics, medicine.anatomical_structure, medicine, General Physics and Astronomy, Particle, Atomic physics, Nucleus, Excitation
Abstract: An investigation of the Jπ = 7/2− states at 1316 and 1408 keV excitation in 55Fe is presented as a test of the coexistence of particle and hole states in that nucleus. The lifetimes were measured using the solid stopper Doppler shift attenuation technique, yielding values of [Formula: see text] and τ > 4 ps for the 1316 and 1408 keV levels respectively. The 1408 → 1316 keV branch was determined to be 2.5 ± 0.5%. The results are compared with other available experimental information and with the predictions of a quasiparticle–core coupling calculation. The model analysis indicates very limited mixing of particle and hole configurations.
Published: 1975

48. Neutron production from thick-target (α, n) reactions

Author: P. Skensved, B. C. Robertson, R. Heaton, and H.W. Lee
Subjects: Nuclear reaction, Baryon, Nuclear physics, Physics, Nuclear and High Energy Physics, Branching fraction, Hadron, Analytical chemistry, Elementary particle, Neutron, Fermion, Nucleon, Instrumentation
Abstract: A set of thick-target neutron yields from the (α, n) reaction has been constructed using available data. Values for the elements with natural isotopic abundances from Z = 3 to 14 and Z = 26 excluding Z = 10 for α-particle energies from 1.0 to 9.8 MeV are presented.
Published: 1989

49. Gamma-ray lifetimes for parity doublets inK41,Ca41

Author: A.B. McDonald, E.D. Earle, M. J. Maynard, S. K. Saha, and B. C. Robertson
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Particle properties, Isotopes of potassium, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Parity (physics), Inelastic scattering, Atomic physics, Spectral line
Abstract: Lifetimes have been measured by direct timing for the 1582 keV, $\frac{3}{{2}^{\ensuremath{-}}}$ level of $^{41}\mathrm{K}$($\ensuremath{\tau}l38$ ps) and the 2010 keV, $\frac{3}{{2}^{+}}$ level of $^{41}\mathrm{Ca}$($\ensuremath{\tau}=730\ifmmode\pm\else\textpm\fi{}18$ ps). These levels are members of closely spaced parity doublets. The sensitivity of measurements to determine the parity mixing within these doublets is discussed.NUCLEAR REACTIONS $^{41}\mathrm{K}$($p$,$p\ensuremath{\gamma}$), ${E}_{x}=1582$ keV, measured $\ensuremath{\tau}$; $^{40}\mathrm{Ca}$($d$,$p\ensuremath{\gamma}$), ${E}_{x}=2010$ keV, measured $\ensuremath{\tau}$. Direct timing.
Published: 1980

50. A Detailed Study of the g9/2 Analogue Resonance in 59Cu by the 58Ni(p,γ) 59Cu Reaction

Author: J. R. Leslie, B. E. Cooke, B. C. Robertson, and W. McLatchie
Subjects: Physics, Nuclear magnetic resonance, Angular distribution, General Physics and Astronomy, Resonance, Transition rate matrix, Resonance strength
Abstract: The resonance in the reaction 58Ni(p,γ)59Cu at Ep = 3.546 MeV has been studied. Gammaray angular distribution studies have clarified the assignment of the resonance (Ex = 6903 keV) and the level at Ex = 3042 keV as Jπ = 9/2+. The resonance strength determination, (2J + 1) × ΓpΓγ/Γ = 6.2 ± 0.7 eV, implies an M1 analogue to antianalogue transition rate of 0.4 W.u. The data are compared with existing experimental results and with theoretical predictions.
Published: 1975

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