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40 results on '"D. M. Moltz"'

1. Tests of the standard model from superallowed Fermi β-decay studies: The 74Rb β-decay

Author

J. R. Leslie, C. E. Svensson, D. F. Hodgson, D. M. Moltz, W. D. Kulp, P. Klages, G. C. Ball, V. E. Iacob, I.S. Towner, A. Piechaczek, J. L. Wood, J.C. Hardy, John D'Auria, Pierre Bricault, M. Lipoglavsek, E. F. Zganjar, Guy Savard, J. A. Macdonald, J. von Schwarzenberg, and H. B. Mak

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Unitarity, Cabibbo–Kobayashi–Maskawa matrix, Branching fraction, Excited state, Double beta decay, Isospin, Hadron, High Energy Physics::Experiment, Fermi Gamma-ray Space Telescope
Abstract

Precise measurements of the intensities of superallowed Fermi 0+ → 0+β-decays have provided a powerful test of the CVC hypothesis at the level of 3×10-4 and also led to a result in disagreement with unitarity for the CKM matrix at the 98% confidence level. It is essential to address possible trivial explanations for the apparent non-unitarity such as uncertainties in the isospin symmetry-breaking corrections. We have carefully studied the 74Rb →74Kr β-decay in order to measure the non-analog β-decay branching to the 0+ state at 508 keV in 74Kr. We have determined that this branching is < 3×10-4, far smaller than any published theoretical estimate. We also show that high-precision, complete spectroscopy, measuring the major β-branches to excited 0+ and 1+ states, must be performed if one is to obtain a meaningful branching ratio to the excited 0+ state and concomitantly deal, in a substantial way, with the possibility of β feeding to an array of 1+ states.

Published
2002

2. Midrapidity Antiproton-to-Proton Ratio fromAu+AuCollisions atsNN=130GeV

Author

Sergey Voloshin, J. Engelage, K. J. Foley, R. S. Longacre, J. M. Landgraf, M. Strikhanov, N. Xu, C. Roy, J. Sandweiss, G. D. Westfall, J. Baudot, B. Erazmus, J. Castillo, Y. V. Zanevski, Malgorzata Anna Janik, G. Igo, J. Carroll, D. M. Moltz, S. W. Wissink, A. A. Kuznetsov, C. O. Blyth, B. Norman, A. Klyachko, A. Maliszewski, H. M. Spinka, V. M. Leontiev, Olivier Ravel, R. Wells, V. A. Nikitin, K. Turner, T. Ullrich, D.E. Greiner, A. C. Saulys, K. E. Shestermanov, D. Cebra, Y. Fisyak, P. Fachini, A. Ogawa, Ian Johnson, V. S. Shvetcov, C. A. Whitten, Z. Z. Xu, T. J.M. Symons, E. Platner, A. Stolpovsky, H. Hümmler, W. Pinganaud, Jay Roberts, P. Leszczynski, S. Lange, T. Herston, S. J. Lindenbaum, Adam Ryszard Kisiel, P. Seyboth, Lee Stuart Barnby, Yu Melnick, L. Kotchenda, W. Christie, Vladimir Tikhomirov, S. Y. Panitkin, R. Bossingham, M. Lopez-Noriega, H. J. Crawford, J. G. Cramer, C. L. Kunz, B. Choi, A. Szanto de Toledo, C. F. Moore, H. G. Ritter, M. Castro, J. Lamas-Valverde, N. Schmitz, A. I. Kulikov, Matthew J. Anderson, R. Bellwied, A. S. Konstantinov, H. Bichsel, G. Odyniec, V. Trofimov, A. P. Meschanin, K. Krueger, Alexander Kovalenko, L. V. Nogach, R. Witt, E. Yamamoto, J. H. Thomas, L. Conin, G. Skoro, A. A.P. Suaide, Christophe Pierre Suire, Masashi Kaneta, M. Heffner, W. M. Zhang, Andrey Vasiliev, J. C. Dunlop, S. Radomski, S. Trentalange, C. E. Allgower, Zubayer Ahammed, V. Ghazikhanian, M. J. LeVine, A. H. Tang, W. A. Love, Joakim Nystrand, M. Cherney, John Z. H. Zhang, Thomas Michael Cormier, Vladimir Petrov, E. G. Judd, P. Nevski, T. Pawlak, David Lynn, L. Madansky, M. Kramer, G. S. Averichev, S. P. Chernenko, W. J. Llope, T. S. McShane, I. Sakrejda, E. Sugarbaker, A. Cardenas, Janet Elizabeth Seger, H. Z. Huang, D. Russ, Yu Chen, Fuqiang Wang, G. S. Mutchler, C. P. Lansdell, R.J.M. Snellings, J. Porter, L. S. Schroeder, Guy Paic, A. Chikanian, S. S. Shimanskii, J. Mitchell, B. Lasiuk, J. Grabski, A. I. Pavlinov, H. Long, Frank Jm Geurts, M. B. Tonjes, V. Morozov, P. Szarwas, V. I. Yurevich, J. N. Marx, D. Hardtke, F. Laue, R. D. Majka, A. V. Brandin, J. Sowinski, B. K. Srivastava, I. M. Vasilevski, J. Berger, J. Gans, E. Finch, Boris Hippolyte, S. E. Vigdor, V. A. Moiseenko, T. J. Humanic, Christian Claude Kuhn, A. Boucham, Marcelo Gameiro Munhoz, D. J. Prindle, I.A. Savin, N. T. Porile, V. B. Dunin, S. Bekele, E. J. Stephenson, M. A. Lisa, Yu A. Matulenko, M. Horsley, B. Stringfellow, A. Ishihara, R. Willson, D. G. Underwood, A. M. VanderMolen, D. Reichhold, T. J. Hallman, A. M. Poskanzer, A. Vanyashin, M. Tokarev, H. H. Wieman, A. S. Hirsch, P. Kravtsov, C. Adler, C. Struck, J. Takahashi, A. Ridiger, Torre Wenaus, Jeffrey G. Reid, Thomas A. Trainor, Morton Kaplan, R. P. Scharenberg, H. S. Matis, C. A. Ogilvie, W. W. Jacobs, D. Seliverstov, A. Schüttauf, Subhasis Chattopadhyay, Peter Martin Jacobs, S. Heppelmann, S. V. Razin, D. Flierl, H. Ward, M. A. C. Lamont, S. B. Nurushev, Z. Milosevich, L. Martin, G. Van Buren, R. K. Kutuev, J. M. Nelson, H. Stroebele, W. Peryt, J. E. Draper, N.D. Gagunashvili, J. P. Coffin, O. V. Rogachevski, V. Perevoztchikov, Alexander Khodinov, L. C. Bland, S. U. Pandey, A. E. Yakutin, J. W. Harris, E. Gushin, G. J. Kunde, P. Yepes, V. Eckardt, A. Yokosawa, G. Eppley, J. Pluta, Q. Li, Gerald W Hoffmann, Mingshui Chen, Thomas LeCompte, W. S. Deng, S. Margetis, O. A. Grachov, V. Grigoriev, R. L. Ray, E. Potrebenikova, V. V. Belaga, T. Ljubicic, F. Retiere, N. G. Minaev, H. Caines, V. L. Rykov, Peter Graham Jones, L. Didenko, J. Schambach, E. L. Hjort, J. Balewski, M. C. de la Barca Sánchez, A. Lebedev, M. M. de Moura, Marie Germain, Claude Andre Pruneau, Y. Panebratsev, G. Rai, A. N. Zubarev, R. Zoulkarneev, J. Klay, Jinghui Yang, G. LoCurto, S. R. Klein, O. Barannikova, D. L. Olson, M. DeMello, M. Oldenburg, V. Emelianov, A. A. Derevschikov, D. Keane, Nikolai Smirnov, R. Stock, L. G. Efimov, Yu. Ivanshin, B. E. Bonner, O. D. Tsai, and M. I. Ferguson

Subjects
Physics, Range (particle radiation), Particle physics, Proton, General Physics and Astronomy, Baryon, Nuclear physics, Pair production, Antiproton, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, Nucleon, Energy (signal processing)
Abstract

We report results on the ratio of mid-rapidity anti-proton to proton yields in Au+Au collisions at $\rts = 130$ GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of $|y

Published
2001

3. Precise Half-Life Measurement for the Superallowed0+→0+βEmitter74Rb: First Results from the New Radioactive Beam Facility (ISAC) at TRIUMF

Author

Pierre Bricault, V. E. Iacob, John Behr, J. Cerny, G. Boisvert, D. M. Moltz, J.C. Hardy, M. Dombsky, J. R. Leslie, G. C. Ball, J. Powell, Shawn Bishop, T. Lindner, J. A. Macdonald, John D'Auria, Guy Savard, H. B. Mak, and I. S. Towner

Subjects
Physics, Nuclear physics, Particle physics, Unitarity, Isospin, General Physics and Astronomy, Beta (velocity), Symmetry breaking, Beta decay, Beam (structure), Fermi Gamma-ray Space Telescope, Standard Model
Abstract

Presently, the world data for superallowed {beta} decay leads to a result in disagreement (at the 98% confidence level) with the predictions of the minimal standard model for the unitarity of the Cabibbo-Kobayashi-Maskawa matrix. Precise data for the superallowed 0{sup +}{yields}0{sup +} {beta} decay of {sup 74}Rb would provide a critical test of the nucleus-dependent isospin symmetry-breaking corrections that must be calculated for these superallowed Fermi {beta} decays. The present work reports the first precise measurement of the half-life for {sup 74}Rb (t{sub 1/2}=64.761{+-}0.031 ms ). The data were obtained at the radioactive beam facility (ISAC) at TRIUMF using a beam of {approx}4000 {sup 74}Rb ionss{sup -1} .

Published
2001

4. Elliptic Flow inAu+AuCollisions at√sNN=130GeV

Author

N. Stone, Christophe Pierre Suire, A. Lebedev, B. Miller, M. M. de Moura, M. Dialinas, P. Middlekamp, J. Scheblien, V. Ghazikhanian, A. Etkin, A. H. Tang, A. P. Meschanin, R.Kh. Kutuev, J. Berger, J. L. Romero, V. Fine, J. Engelage, T. J. Humanic, Peter J. Lindstrom, D. Zimmerman, I.A. Savin, N. T. Porile, Yu A. Matulenko, M. Horsley, Thomas LeCompte, B. Stringfellow, J. Sedlmeir, L. Smykov, E. Finch, T. S. McShane, J. W. Harris, Joakim Nystrand, V. B. Dunin, J. Grabski, P. Seyboth, D. Dayton, C. J. Liaw, R. Bossingham, J. N. Marx, C. Drancourt, S. Tonse, W. S. Deng, J. G. Cramer, R. A. Scheetz, A. Stolpovsky, H. Hümmler, L. Kotchenda, G. Koehler, E. Gushin, G. J. Kunde, P. Yepes, V. Eckardt, M. Kramer, A. I. Pavlinov, Y. Panebratsev, D. Grosnick, Granville Ott, G. Eppley, A. V. Brandin, V. Trofimov, J. M. Landgraf, M. Strikhanov, K. Krueger, M. B. Tonjes, E. I. Shakaliev, A. Yokosawa, Jinghui Yang, E. Sugarbaker, J. Hunter, H. Z. Huang, V. Morozov, A. Tarchini, S. V. Razin, K. Wilson, G. Rai, Y. Shi, G. Van Buren, J. M. Nelson, P. A. DeYoung, J. Pluta, C. Roy, H. Stroebele, J. Carroll, C. Byrd, N. Xu, G. D. Westfall, D. Padrazo, R. Wells, C. Struck, W. Pinganaud, D. Hardtke, F. Laue, J.F. Amsbaugh, Jay Roberts, N. Adams, David Fritz, J. Sandweiss, G. LoCurto, A. C. Saulys, S. R. Klein, C. E. Allgower, R. D. Majka, J. Zhu, Sergey Voloshin, J. Sowinski, Matthew Nguyen, W. Peryt, J. Takahashi, J. Wolf, C. Feliciano, Y. Fisyak, L. Greiner, K. J. Foley, J. Schambach, E. L. Hjort, S. Pirogov, A. Ogawa, Ian Johnson, Krista M. Marks, S. E. Vigdor, Vladimir Petrov, C. L. Kunz, Z. Li, O. Barannikova, D. L. Olson, F. P. Brady, Gerald W Hoffmann, S. P. Chernenko, D. Seliverstov, A. Schüttauf, Christian Claude Kuhn, W. J. Llope, Q. Li, C. O. Blyth, C. F. Moore, M. Cherney, H. Fessler, W. Christie, Thomas Michael Cormier, D.E. Greiner, T. Krupien, Torre Wenaus, Masashi Kaneta, Ross Schlueter, W. M. Zhang, Andrey Vasiliev, D. Hill, Richard C. Jared, M. Calderón de la Barca Sánchez, R. Weidenbach, T. Nguyen, A. Cardenas, Peter Martin Jacobs, N. Schmitz, S. Chatopadhyay, P. Nevski, M. Lopez-Noriega, A. Klyachko, R. Witt, E. Yamamoto, J. Klay, Thomas A. Trainor, W. R. Edwards, P. Sappenfield, N.D. Gagunashvili, J. Baudot, E. A. Matyushevski, P. Kuczewski, J. C. Dunlop, A. A. Derevschikov, K. Olchanski, V. I. Danilov, C. P. Lansdell, Wilfred J. Braithwaite, E. Mogavero, R.J.M. Snellings, Janet Elizabeth Seger, J. Lin, M. A. C. Lamont, S. B. Nurushev, Z. Milosevich, B. Lasiuk, J. Wisdom, Y. V. Zanevski, F. Retiere, W. Hunt, V. Kormilitsyne, D. Russ, B. E. Bonner, J. T.M. Chrin, G. S. Mutchler, H. Diaz, J. R. Hall, Zubayer Ahammed, G. A. Ososkov, M. J. LeVine, B. Norman, J. Gross, H. Long, K. Bradley, Yu Chen, Wen-Chang Chen, N. G. Minaev, O. D. Tsai, R. P. Scharenberg, Marie Germain, R. Seymour, M. A. Howe, B. Choi, R. Marstaller, W. Betts, Vladimir Tikhomirov, Salahuddin Ahmad, I. Polk, H. S. Matis, G. C. Harper, A. S. Hirsch, P. Kravtsov, A. Maliszewski, Alexander Kovalenko, L. V. Nogach, L. C. Bland, S. Bennett, H. J. Crawford, I. Vakula, C. Adler, F. S. Bieser, L. Wood, A. N. Zubarev, C. A. Ogilvie, G. Brugalette, V. S. Shvetcov, L. S. Schroeder, J. Meier, H. Liu, S. U. Pandey, A. E. Yakutin, I. Flores, Morton Kaplan, V. Perevotchikov, C. A. Whitten, M. Pentia, Marek Gazdzicki, L. Lakehal-Ayat, D. Lopiano, S. Trentalange, A. Ridiger, W. W. Jacobs, M. I. Ferguson, J. Lamas-Valverde, C. Gojak, M. Botlo, Guy Paic, I. Sakrejda, T. Ngo, E. Platner, B. Minor, V. Lindenstruth, V. A. Nikitin, S. Heppelmann, D. Flierl, Ma Bloomer, John Z. H. Zhang, A. Chikanian, S. S. Shimanskii, J. Mitchell, E. G. Judd, L. Martin, Jeffrey G. Reid, B. K. Srivastava, I. M. Vasilevski, K. E. Shestermanov, V. V. Belaga, Lincoln D. Carr, J. Gans, S. Lange, L. Arnold, Boris Hippolyte, G. Skoro, M. Heffner, J. E. Draper, J. Puskar-Pasewicz, R. Morse, V. Grigoriev, J. P. Coffin, O. V. Rogachevski, N. Bouillo, M. DeMello, S. J. Lindenbaum, N. Mikhalin, A. Boucham, H. Ward, M. Oldenburg, Peter Graham Jones, R. L. Ray, V. Emelianov, D. Keane, A. R. Baldwin, A. A. P. Suaide, L. Didenko, Damien Bonnet, Nikolai Smirnov, R. Stock, S. Y. Panitkin, E. Potrebenikova, W. J. Leonhardt, S. Bekele, S. Bouvier, V. P. Kenney, L. G. Efimov, Frank Jm Geurts, Yu. Ivanshin, J. Castillo, S. W. Wissink, R. L. Brown, W. Dominik, P. Jensen, A. Ishihara, T. Ljubicic, Alexander Khodinov, Robert Stone, M. Tokarev, G. Guilloux, Robert R. J. Maier, D. DiMassimo, E. Anderssen, A. M. VanderMolen, H. H. Wieman, H. Caines, S. Jacobson, D. Shuman, R. Willson, D. G. Underwood, J. Wirth, D. Reichhold, T. J. Hallman, T. J. M. Symons, K. Turner, A. Szanto de Toledo, A. M. Poskanzer, J. Tarzian, P. He, K. Solberg, T. Pawlak, A. Vanyashin, Z. Sandler, B. Caylor, R. S. Longacre, V. L. Rykov, J. Porter, G. Igo, J. Seyboth, P. Fachini, D. D. Weerasundara, Mingshui Chen, M. Grau, S. Margetis, O. A. Grachov, M. Schulz, J. R. Lutz, Rainer Arno Ernst Renfordt, J. Balewski, H. G. Ritter, Claude Andre Pruneau, H. Arnesen, R. Zoulkarneev, R. Bellwied, A. S. Konstantinov, K. H. Ackermann, D. M. Moltz, A. A. Kuznetsov, Ivan Kotov, T. Noggle, V. M. Leontiev, Olivier Ravel, J. Whitfield, T. Ullrich, D. Roehrich, B. Erazmus, Z. Z. Xu, D. Cebra, C. Consiglio, M. Beddo, Yu Melnick, P. Leszczynski, J. Bercovitz, T. Herston, J. Riso, Lee Stuart Barnby, V. A. Moiseenko, Marcelo Gameiro Munhoz, D. J. Prindle, E. J. Stephenson, M. A. Lisa, W. A. Love, T. Nussbaum, Daniel Ferenc, Fuqiang Wang, H. Bichsel, G. Odyniec, V. I. Yurevich, E. S. Braithwaite, J. Boehm, T. Eggert, David Lynn, L. Madansky, R. Sanchez, J. Dioguardi, J. H. Thomas, L. Conin, G. Visser, G. S. Averichev, C. P. McParland, H. M. Spinka, J. Rasson, Chinh Vu, and Matthew J. Anderson

Subjects
Physics, Particle physics, Time projection chamber, Hadron, Elliptic flow, General Physics and Astronomy, Observable, Particle accelerator, Charged particle, law.invention, Nuclear physics, law, Pseudorapidity, Nuclear Experiment, Relativistic Heavy Ion Collider
Abstract

Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at √(sNN) = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v₂, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.

Published
2001

5. BEARS: radioactive ion beams at Berkeley

Author

Claude M. Lyneis, C.A Donahue, Joseph Cerny, D. Wutte, J. Fujisawa, J. Powell, Henry F. VanBrocklin, D. M. Moltz, X. J. Xu, F. Q. Guo, Z. Q. Xie, J. P. O'Neil, P. E. Haustein, R. Joosten, M. W. Rowe, Eric B. Norman, R.F Fairchild, M. A. McMahan, Ruth-Mary Larimer, and M.A Ostas

Subjects
Physics, Radioactive ion beams, Nuclear and High Energy Physics, Cyclotron, Particle accelerator, Ion, law.invention, Nuclear physics, law, Atomic physics, National laboratory, Instrumentation, Beam (structure), Transport system
Abstract

A light-isotope radioactive ion-beam capability has been added to the 88-in. Cyclotron at Lawrence Berkeley National Laboratory by coupling to the production cyclotron of the Berkeley Isotope Facility. The connection required the development and construction of a 350 m gas transport system between the two accelerators as well as automated cryogenic separation of the produced activity. The "rst beam developed, 11C, has been successfully accelerated with an on-target intensity of 1]108 ions/s at energies of around 10 MeV/u. ( 2000 Elsevier Science B.V. All rights reserved.

Published
2000

6. Electron-capture decay ofTc100and the double-β decay ofMo100

Author

Eric B. Norman, A. García, M. T. F. da Cruz, M. M. Hindi, I. Zlimen, F. E. Wietfeldt, K. T. Lesko, R. G. Stokstad, Ruth-Mary Larimer, T.J. Ognibene, J. C. Batchelder, D. M. Moltz, and Yuen-Dat Chan

Subjects
Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Decay scheme, Branching fraction, Electron capture, Double beta decay, Atomic physics, Radioactive decay
Abstract

We have measured the electron-capture decay branch of $^{100}\mathrm{Tc}$ to be (1.8\ifmmode\pm\else\textpm\fi{}0.9)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$%, from which we deduce logft=4.${45}_{\mathrm{\ensuremath{-}}0.30}^{+0.18}$. This indicates that a two-step process connecting only the ground states of $^{100}\mathrm{\ensuremath{-}}^{100}$Tc${\mathrm{\ensuremath{-}}}^{100}$Ru can account for the measured 2\ensuremath{\nu} double-\ensuremath{\beta}-decay rate of $^{100}\mathrm{Mo}$.

Published
1993

7. Search for ground state proton emission fromAs65andBr69

Author

Joseph Cerny, D. M. Moltz, Thomas Lang, J.D. Robertson, and J. E. Reiff

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Proton, Isotopes of bromine, Nuclide, Atomic physics, Proton emission, Ground state, Beta decay, Radioactive decay
Abstract

The ground state proton decays of {sup 65}As and {sup 69}Br have been searched for in {sup 28}Si and {sup 32}S bombardments of a natural calcium target. These studies employed a newly developed rapidly rotating recoil-catcher wheel and a low-energy particle-identification telescope. No proton groups that could be assigned to either of these nuclides were observed. The minimum detectable limits indicate that {sup 65}As and {sup 69}Br either decay predominantly by beta emission or have half-lives less than 100 {mu}s. The overall evidence strongly indicates that {sup 65}As predominantly beta decays.

Published
1990

8. Ca37β+decay and the efficiency of theCl37detector for high energy neutrinos

Author

T. F. Lang, D. M. Moltz, H. E. Swanson, Eric Adelberger, and A. Garca

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Proton decay, Excited state, Product (mathematics), Double beta decay, Beta particle, Neutrino, Atomic physics, Beta decay
Abstract

There is a qualitative disagreement between the Gamow-Teller strength function extracted from the \ensuremath{\beta}-delayed proton decay of $^{37}\mathrm{Ca}$ and that estimated using the $^{37}\mathrm{Cl}$(p,n) reaction. Adelberger and Haxton have shown that this could be explained by the strong tendency of high energy states in $^{37}\mathrm{K}$ to proton decay to $^{36}\mathrm{Ar}$ in its first excited state. We present the results of an experiment confirming this idea. By detecting proton-\ensuremath{\gamma} coincidences we determined that the fraction of $^{37}\mathrm{Ca}$ decays that feed the first excited state of $^{36}\mathrm{Ar}$ is 2.9\ifmmode\pm\else\textpm\fi{}0.8 %. This should be compared to a shell model prediction of 1.80\ifmmode\pm\else\textpm\fi{}0.20 %. We also present some information on the \ensuremath{\beta} decay of $^{25}\mathrm{Si}$ obtained as a by- product of our experiment.

Published
1990

9. High precision branching ratio measurement for the superallowed β decay of74Rb:A prerequisite for exacting tests of the standard model

Author

M. Lipoglavsek, Pierre Bricault, P. Klages, J. L. Wood, J. von Schwarzenberg, H. B. Mak, E. F. Zganjar, I. S. Towner, J. C. Hardy, Guy Savard, A. Piechaczek, D. F. Hodgson, John D'Auria, V. E. Iacob, G. C. Ball, W. D. Kulp, J. A. Macdonald, D. M. Moltz, J. R. Leslie, and C. E. Svensson

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Electron spectra, Particle model, Branching fraction, Double beta decay, Beta decay, Radioactive decay, Standard Model
Published
2003

10. Star detector overview

Author

L. V. Nogach, A. Stolpovsky, H. Hümmler, L. Kotchenda, P. Seyboth, T. Krupien, D. Dayton, V. A. Nikitin, C.J. Liaw, J.F. Amsbaugh, M. Castro, K. E. Shestermanov, A. R. Baldwin, M. Calderon De La Barca Sanchez, Matthew Nguyen, T. Dietel, D.E. Greiner, A. Lebedev, J. Schambach, C. P. McParland, J. Gross, S. Pirogov, R. Seymour, S. Bennett, F. Liu, L. Lakehal-Ayat, D. Zimmerman, A. Ridiger, W. Christie, R. L. Brown, Q. Li, C. Gojak, A. Hirsch, C. P. Lansdell, I.A. Savin, N. T. Porile, A. Tarchini, Alexandre Alarcon Do Passo Suaide, S. Heppelmann, D. Flierl, V. Perevoztchikov, L. Martin, Vladimir Petrov, B. Miller, M. Dialinas, D. Russ, Yu Chen, N. G. Minaev, Jinghui Yang, S. P. Chernenko, Granville Ott, R. V. Cadman, J. E. Draper, Frank Jm Geurts, Lianshou Liu, C. O. Blyth, H. Diaz, Yu A. Matulenko, W. J. Llope, M. Horsley, T. Nguyen, A. Cardenas, Sergey Voloshin, G. LoCurto, H. G. Ritter, G. Van Buren, Sergey Panitkin, B. Stringfellow, J. Sedlmeir, N. Schmitz, B. Lasiuk, H. Long, K. J. Foley, Wen-Chang Chen, S. R. Klein, H. Fessler, P. Jensen, R. K. Kutuev, M. A. Howe, K. Krueger, C. Struck, W. Deng, J. P. Coffin, D. Shuman, R. Willson, O. Barannikova, D. L. Olson, J. G. Cramer, B. Choi, O. V. Rogachevski, E. Shahaliev, C. Consiglio, L. Smykov, J. Takahashi, J. W. Watson, B. Norman, J. Wirth, R. Bossingham, W. Hunt, Damien Bonnet, J. R. Hall, M. Kopytine, Thomas LeCompte, Gary Westfall, B. D. Anderson, R. Weidenbach, C. E. Allgower, J. M. Nelson, J. Rasson, H. Stroebele, G. C. Harper, D. Reichhold, Q. J. Liu, V. S. Shvetcov, C. A. Whitten, S. Tonse, E. Sugarbaker, B. E. Bonner, Torre Wenaus, Alexander Kovalenko, V. Trofimov, M. Gazdzicki, J. Baudot, E. Platner, T. Ljubicic, Thomas A. Trainor, W. R. Edwards, G. Guilloux, A. I. Kulikov, T. J. Hallman, T. J. M. Symons, Chinh Vu, A. A. Derevschikov, M. Cherney, W. Peryt, P. Kravtsov, C. Adler, O. D. Tsai, P. G. Jones, J. Seger, M. Kramer, J. Engelage, E. Yamamoto, Y. V. Zanevski, S. Lange, I. Zborovský, Thomas Michael Cormier, F. Meissner, D. G. Underwood, Jeffrey G. Reid, S. J. Lindenbaum, I. Polk, S. Bouvier, J. T.M. Chrin, Matthew J. Anderson, Derek L. G. Hill, V. Lindenstruth, Masashi Kaneta, R. P. Scharenberg, John N. Wood, J. H. Thomas, L. Conin, G. Visser, W. M. Zhang, A. Yokosawa, J. Berger, Andrey Vasiliev, G. Eppley, P. Nevski, E. Mogavero, A. H. Tang, J. Marx, J. Sowinski, A. E. Yakutin, M. Burkes, J. W. Harris, D. Padrazo, S. Jacobson, M. I. Ferguson, D. Seliverstov, A. Schüttauf, T. S. McShane, I. Vakula, Malgorzata Anna Janik, H. S. Matis, A. N. Zubarev, C. A. Ogilvie, Z. Liu, M. Beddo, David Fritz, Mikhail Tokarev, J. Wolf, P. A. DeYoung, J. Pluta, J. Meier, I. Flores, M. Messer, A. C. Saulys, Subhasis Chattopadhyay, Nu Xu, J. M. Landgraf, Peter Martin Jacobs, K. Turner, A. V. Brandin, D. Roehrich, B. Erazmus, J. Grabski, P. Fachini, J. Tarzian, G. Koehler, M. Botlo, D. Lynn, H. M. Spinka, E. Gushin, G. J. Kunde, P. Yepes, V. Eckardt, Ma Bloomer, R. Lednicky, H. Caines, Y. Fisyak, A. Ogawa, Ian Johnson, J. Riso, R. Renfordt, Christina Markert, F. Laue, A. Szanto de Toledo, Sevil Salur, N. Bouillo, Z. Milosevich, R. E. Tribble, W. A. Love, A. Vanyashin, G. S. Averichev, S. E. Vigdor, Christian Claude Kuhn, Y. Panebratsev, F. Retiere, V. V. Belaga, H. Ward, S. B. Nurushev, G. S. Mutchler, J. Sandweiss, A. Klyachko, K. Solberg, T. Pawlak, Adam Ryszard Kisiel, Gerald W Hoffmann, D. Grosnick, N.D. Gagunashvili, C. Drancourt, J. Puskar-Pasewicz, G. Rai, J. Lin, P. Sorensen, H. Wieman, J. Porter, K. Bradley, S. U. Pandey, M. Germain, G. Brugalette, A. I. Pavlinov, L. G. Efimov, M. B. Tonjes, Richard C. Jared, Salahuddin Ahmad, E. G. Judd, F. S. Bieser, M. Schulz, K. Schweda, D. Cebra, S. Trentalange, Michael A. Thompson, V. Morozov, I. Sakrejda, B. Minor, T. Ullrich, A. Tai, L. Didenko, A. Khodinov, R. Maier, J. Amonett, Yu Melnick, Morton Kaplan, J. Klay, M. DeMello, D. Hardtke, M. Oldenburg, R. D. Majka, M. M. de Moura, M. L. Miller, V. Emelianov, D. Keane, Michal Sumbera, H. Z. Huang, Nikolai Smirnov, N. Stone, R. Stock, R. Bellwied, J. Mitchell, P. Szarwas, A. S. Konstantinov, William Jacobs, K. H. Ackermann, Yu. Ivanshin, K. Filimonov, L. C. Bland, H. Bichsel, Hank Crawford, C. Suire, D. M. Moltz, R. S. Longacre, P. Middlekamp, A. A. Kuznetsov, V. M. Leontiev, Olivier Ravel, A. Etkin, J. Whitfield, V. Faine, L. Arnold, G. Skoro, M. Heffner, J. Castillo, S. W. Wissink, R. Sanchez, J. Dioguardi, V. A. Moiseenko, Marcelo Gameiro Munhoz, D. J. Prindle, H. Zhang, J. Hunter, E. J. Stephenson, M. A. Lisa, B. Srivastava, M. Lopez-Noriega, W. Betts, Lee Stuart Barnby, Z. Sandler, Ivan Kotov, M. A.C. Lamont, T. Noggle, G. Igo, G. Odyniec, C. A. Gagliardi, J. Bercovitz, T. Herston, J. Scheblien, A. P. Meschanin, T. Nussbaum, Daniel Ferenc, Fuqiang Wang, Joakim Nystrand, R. A. Scheetz, V. I. Yurevich, J. Boehm, C. Roy, F. P. Brady, T. Eggert, E. Hjort, Thomas Humanic, P. Kuczewski, K. Olchanski, J. Wisdom, J. Carroll, Vladimir Tikhomirov, S. Margetis, R. Wells, C. Feliciano, L. Greiner, A. Ishihara, Ross Schlueter, D. DiMassimo, E. Anderssen, V. A. Okorokov, M. Guedon, A. M. VanderMolen, V. Ghazikhanian, Guy Paic, A. Chikanian, S. S. Shimanskii, A. Boucham, Zhongbin Xu, V. B. Dunin, W. J. Leonhardt, S. Bekele, Peter J. Lindstrom, E. Finch, R. Witt, J. Fu, I. M. Vasilevski, Lincoln D. Carr, J. Gans, Boris Hippolyte, J. C. Dunlop, Zubayer Ahammed, M. J. LeVine, L. S. Schroeder, S. V. Razin, M. Strikhanov, L. Gaudichet, J. L. Romero, K. Wilson, J. Kiryluk, W. Pinganaud, Jay Roberts, N. Adams, C. L. Kunz, C. F. Moore, V. Grigoriev, R. L. Ray, E. Potrebenikova, V. L. Rykov, Raimond Snellings, J. Balewski, Claude Andre Pruneau, H. Arnesen, R. Zoulkarneev, A. M. Poskanzer, D. D. Weerasundara, Mingshui Chen, M. Grau, I. Danilov, O. A. Grachov, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), STAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Elliptic flow, Star (graph theory), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Particle detector, Nuclear physics, Electromagnetic calorimeter, relativistic heavy ions, tracking detectors, electromagnetic calorimeters, gas detectors, silicon detectors, plus au collisions, root-s(nn)=130 gev, au+au collisions, elliptic flow, tpc, 0103 physical sciences, Quark–gluon plasma, Measuring instrument, Astrophysics::Solar and Stellar Astrophysics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, 010306 general physics, Instrumentation, Astrophysics::Galaxy Astrophysics, STAR detector
Abstract

An introduction to the STAR detector and a brief overview of the physics goals of the experiment are presented. (C) 2002 Elsevier Science B.V. All rights reserved.

Published
2003

11. A proposed search for dark-matter axions in the 0.6-16 mu eV range

Author

J.V. Steel, N. Golubev, Pierre Sikivie, K. van Bibber, F. Villa, D.S. Slack, A.I. Bluele, E.V. Geraskin, V. Kuzmin, Neil Sullivan, P.L. Anthony, O. Kazachenko, V.G. Polushkin, D. M. Moltz, S. Shen, R.E. Patrick, Michael S. Turner, V.V. Ishkin, David B. Tanner, and C. Hagmann

Subjects
Nuclear physics, Physics, Particle physics, Photon, Dark matter, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Axion, Primakoff effect, Microwave, Particle identification, Microwave cavity
Abstract

An experiment proposed to search for dark-matter axions in the mass range 0.6-16 mu eV is described. The method is based on the Primakoff conversion of axions into monochromatic microwave photons inside a tunable microwave cavity in a large-volume high-field magnet. This proposal capitalizes on the availability of two Axicell magnets from the MFTF-B fusion machine at Lawrence Livermore National Laboratory. Assuming a local dark-matter density in axions of rho /sub a/=0.3 GeV/cm/sup 3/, the axion would be found or ruled out at the 97% c.l. in the above mass range in 48 months. >

Published
2002

12. Midrapidityφproduction in Au+Au collisions atsNN=130GeV

Author

A. Ishihara, Christophe Pierre Suire, J. G. Cramer, Q. Li, A. H. Tang, A. S. Hirsch, P. Kravtsov, C. Adler, M. Kramer, H. Bichsel, G. Odyniec, Jeffrey G. Reid, J. Amonett, T. J. Humanic, N. Xu, David Lynn, M. DeMello, I.A. Savin, N. T. Porile, M. Oldenburg, Subhasis Chattopadhyay, J. W. Harris, G. D. Westfall, J. H. Thomas, J. Engelage, M. Lopez-Noriega, V. Emelianov, D. Keane, Yu A. Matulenko, E. Gushin, G. J. Kunde, P. Yepes, V. Eckardt, Malgorzata Anna Janik, M. Horsley, P. Seyboth, Thomas LeCompte, B. Stringfellow, A. Yokosawa, A. Lebedev, V. V. Belaga, Nikolai Smirnov, R. Stock, T. S. McShane, J. Mitchell, A. Ridiger, J. M. Landgraf, N.D. Gagunashvili, I. Sakrejda, A. Stolpovsky, H. Hümmler, M. Strikhanov, M. M. de Moura, M. L. Miller, P. Szarwas, V. A. Moiseenko, R.Kh. Kutuev, J. Berger, L. G. Efimov, B. D. Anderson, Marcelo Gameiro Munhoz, C. Struck, D. J. Prindle, L. Kotchenda, J. Takahashi, J. Grabski, R. S. Longacre, S. Radomski, D. Seliverstov, A. Schüttauf, Yu. Ivanshin, W. S. Deng, J. W. Watson, H. Zhang, B. E. Bonner, E. J. Stephenson, Torre Wenaus, K. Krueger, V. S. Shvetcov, I. Zborovský, W. Christie, J. Sandweiss, M. A. Lisa, Mingshui Chen, C. A. Whitten, E. Platner, Peter Graham Jones, M. Castro, G. Eppley, A. I. Kulikov, J. C. Dunlop, Peter Martin Jacobs, Thomas A. Trainor, J. N. Marx, Masashi Kaneta, O. D. Tsai, C. E. Allgower, W. M. Zhang, Andrey Vasiliev, Y. Fisyak, A. Ogawa, Ian Johnson, G. Igo, S. Heppelmann, D. Flierl, L. Martin, A. M. Poskanzer, S. Lange, V. B. Dunin, J. Pluta, E. G. Judd, V. Perevoztchikov, L. Didenko, S. J. Lindenbaum, M. Cherney, M. A. C. Lamont, S. B. Nurushev, Thomas Michael Cormier, Z. Milosevich, L. C. Bland, Janet Elizabeth Seger, C. O. Blyth, Zubayer Ahammed, M. J. LeVine, G. S. Averichev, Sergey Panitkin, A. Vanyashin, B. Erazmus, G. S. Mutchler, J. E. Draper, P. Nevski, S. Margetis, P. Fachini, A. I. Pavlinov, S. U. Pandey, A. E. Yakutin, B. Norman, M. B. Tonjes, D. Russ, O. A. Grachov, D. Cebra, Yu Chen, J. P. Coffin, O. V. Rogachevski, V. Morozov, C. P. Lansdell, L. S. Schroeder, Gerald W Hoffmann, F. Retiere, N. G. Minaev, Yu Melnick, D. Hardtke, Marie Germain, R. D. Majka, V. Faine, A. P. Meschanin, J. Sowinski, E. Sugarbaker, H. Z. Huang, J. Schambach, R.J.M. Snellings, J. Castillo, S. W. Wissink, A. N. Zubarev, F. Meissner, Adam Ryszard Kisiel, H. M. Spinka, M. Messer, R. P. Scharenberg, V. Grigoriev, M. Tokarev, Morton Kaplan, Y. Panebratsev, R. Willson, D. G. Underwood, G. Rai, H. J. Crawford, H. S. Matis, R. L. Ray, E. Potrebenikova, H. G. Ritter, J. Klay, G. Van Buren, H. H. Wieman, T. Ljubicic, W. W. Jacobs, A. C. Saulys, H. Caines, D. Reichhold, J. M. Nelson, R. Bellwied, A. S. Konstantinov, Matthew J. Anderson, T. J. Hallman, W. Peryt, T. J. M. Symons, Jinghui Yang, V. L. Rykov, G. LoCurto, K. Turner, H. Ward, J. Balewski, S. R. Klein, Claude Andre Pruneau, D. M. Moltz, F. Laue, A. Szanto de Toledo, O. Barannikova, B. Choi, D. L. Olson, T. Pawlak, A. A. Kuznetsov, T. Ullrich, V. M. Leontiev, Olivier Ravel, Alexander Kovalenko, L. V. Nogach, R. Zoulkarneev, A. A. Derevschikov, J. Porter, Vitaly Okorokov, Z. Z. Xu, T. Herston, Lee Stuart Barnby, Sergey Voloshin, K. J. Foley, Vladimir Petrov, S. P. Chernenko, W. J. Llope, A. Cardenas, B. Lasiuk, H. Long, K. Schweda, D.E. Greiner, R. Lednický, V. A. Nikitin, K. E. Shestermanov, M. Calderón de la Barca Sánchez, W. A. Love, J. Baudot, Y. V. Zanevski, A. V. Brandin, M. Šumbera, S. E. Vigdor, Christian Claude Kuhn, L. Lakehal-Ayat, J. Lamas-Valverde, V. Trofimov, Fuqiang Wang, R. V. Cadman, G. Skoro, Frank Jm Geurts, M. Heffner, V. I. Yurevich, M. Guedon, A. M. VanderMolen, J. Fu, B. K. Srivastava, I. M. Vasilevski, J. Gans, Boris Hippolyte, S. V. Razin, V. Ghazikhanian, L. Gaudichet, Jay Roberts, C. L. Kunz, J. L. Romero, C. F. Moore, R. Witt, E. Yamamoto, E. Finch, E. Hjort, J. Carroll, R. Wells, N. Schmitz, E. Shahaliev, C. Roy, A. Klyachko, Vladimir Tikhomirov, S. Trentalange, Guy Paic, A. Chikanian, S. S. Shimanskii, A. A.P. Suaide, A. Boucham, and S. Bekele

Subjects
Nuclear physics, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Quark–gluon plasma, Transverse mass, High Energy Physics::Experiment, Vector meson, Multiplicity (chemistry), Strangeness, Nuclear Experiment, Phi meson, STAR detector
Abstract

We present the first measurement of midrapidity vector meson phi production in Au+Au collisions at RHIC (roots(NN)=130 GeV) from the STAR detector. For the 11% highest multiplicity collisions, the slope parameter from an exponential fit to the transverse mass distribution is T=379+/-50(stat)+/-45(syst) MeV, the yield dN/dy=5.73+/-0.37(stat)+/-0.69(syst) per event, and the ratio N-phi/Nh- is found to be 0.021+/-0.001(stat)+/-0.004(syst). The measured ratio N-phi/N-h(-) and T for the phi meson at midrapidity do not change for the selected multiplicity bins.

Published
2002

13. Identified Particle Elliptic Flow inAu+AuCollisions atsNN=130GeV

Author

Christophe Pierre Suire, E. Sugarbaker, H. Z. Huang, G. Eppley, Vitaly Okorokov, C. O. Blyth, A. H. Tang, J. Pluta, Marie Germain, F. Meissner, J. C. Dunlop, Mingshui Chen, Zubayer Ahammed, B. Norman, M. J. LeVine, A. N. Zubarev, Z. Z. Xu, H. G. Ritter, R. Bellwied, A. S. Konstantinov, F. Retiere, M. Messer, T. S. McShane, A. M. Poskanzer, A. Ishihara, A. Stolpovsky, H. Hümmler, L. Kotchenda, T. Herston, S. Margetis, N. G. Minaev, A. Ridiger, B. Erazmus, O. A. Grachov, A. P. Meschanin, S. Heppelmann, D. Flierl, L. Martin, R. V. Cadman, Gerald W Hoffmann, P. Seyboth, Fuqiang Wang, J. H. Thomas, L. Conin, A. Vanyashin, A. Maliszewski, K. Krueger, J. Amonett, V. I. Yurevich, J. Castillo, S. W. Wissink, D. Cebra, Jinghui Yang, Frank Jm Geurts, J. E. Draper, M. Castro, G. LoCurto, B. Choi, Yu Melnick, R. Wells, J. Engelage, L. S. Schroeder, V. S. Shvetcov, G. Skoro, S. R. Klein, Lee Stuart Barnby, J. P. Coffin, O. V. Rogachevski, C. A. Whitten, Alexander Kovalenko, J. Grabski, M. DeMello, M. Oldenburg, L. V. Nogach, J. Balewski, O. Barannikova, D. L. Olson, R.Kh. Kutuev, M. Heffner, J. Berger, E. Platner, Claude Andre Pruneau, R. S. Longacre, C. E. Allgower, M. Guedon, I. Zborovský, H. Bichsel, J. M. Landgraf, G. Odyniec, Thomas LeCompte, M. Tokarev, S. V. Razin, L. Gaudichet, A. M. VanderMolen, T. Ullrich, S. Lange, A. A. Derevschikov, W. A. Love, M. Strikhanov, B. D. Anderson, R. Zoulkarneev, S. J. Lindenbaum, V. Emelianov, V. V. Belaga, Vladimir Petrov, D. Keane, V. B. Dunin, Sergey Voloshin, Q. Li, G. Igo, N. Xu, C. Roy, M. Cherney, Y. Fisyak, David Lynn, Thomas Michael Cormier, A. Ogawa, Ian Johnson, W. S. Deng, S. P. Chernenko, W. Pinganaud, J. Sandweiss, K. J. Foley, K. Schweda, D.E. Greiner, Jay Roberts, J. N. Marx, G. D. Westfall, V. Grigoriev, P. Nevski, A. Klyachko, D. Russ, Peter Graham Jones, Yu Chen, C. P. Lansdell, R. L. Ray, E. Potrebenikova, G. S. Averichev, R.J.M. Snellings, H. H. Wieman, M. Calderón de la Barca Sánchez, Nikolai Smirnov, R. Stock, P. Fachini, J. Mitchell, Malgorzata Anna Janik, L. G. Efimov, W. J. Llope, L. Didenko, T. Ljubicic, Vladimir Tikhomirov, J. Baudot, C. L. Kunz, K. Turner, V. A. Moiseenko, Marcelo Gameiro Munhoz, D. J. Prindle, H. Caines, L. Lakehal-Ayat, J. Lamas-Valverde, S. Radomski, Y. V. Zanevski, V. L. Rykov, S. Trentalange, E. J. Stephenson, Yu. Ivanshin, A. C. Saulys, N. Schmitz, C. F. Moore, M. A. Lisa, I. Sakrejda, Guy Paic, A. Chikanian, S. S. Shimanskii, F. Laue, A. Szanto de Toledo, J. G. Cramer, A. Cardenas, A. A.P. Suaide, A. Boucham, M. M. de Moura, R. Witt, E. Yamamoto, M. L. Miller, E. Shahaliev, V. Ghazikhanian, S. Bekele, Adam Ryszard Kisiel, P. Szarwas, E. G. Judd, T. Pawlak, H. J. Crawford, A. V. Brandin, S. E. Vigdor, Christian Claude Kuhn, J. L. Romero, H. M. Spinka, J. Porter, M. Kramer, M. Lopez-Noriega, E. Finch, R. Willson, J. Fu, B. K. Srivastava, I. M. Vasilevski, B. Lasiuk, D. G. Underwood, T. J. Humanic, J. Gans, I.A. Savin, Boris Hippolyte, D. Reichhold, H. Long, T. J. Hallman, N. T. Porile, T. J. M. Symons, M. Šumbera, E. Hjort, Matthew J. Anderson, Yu A. Matulenko, L. C. Bland, M. Horsley, J. Carroll, R. Bossingham, B. Stringfellow, S. U. Pandey, A. E. Yakutin, J. W. Harris, V. Trofimov, R. Lednický, V. A. Nikitin, K. E. Shestermanov, Morton Kaplan, E. Gushin, G. J. Kunde, P. Yepes, V. Eckardt, A. Yokosawa, G. Van Buren, J. M. Nelson, H. Stroebele, W. Peryt, D. Seliverstov, A. Schüttauf, Peter Martin Jacobs, M. A. C. Lamont, S. B. Nurushev, Z. Milosevich, P. Leszczynski, D. M. Moltz, A. A. Kuznetsov, V. M. Leontiev, Olivier Ravel, V. Perevoztchikov, C. Struck, J. Takahashi, Sergey Panitkin, J. W. Watson, Subhasis Chattopadhyay, Torre Wenaus, Thomas A. Trainor, N.D. Gagunashvili, W. Christie, A. I. Kulikov, Masashi Kaneta, W. M. Zhang, Andrey Vasiliev, R. P. Scharenberg, A. S. Hirsch, H. S. Matis, Janet Elizabeth Seger, G. S. Mutchler, P. Kravtsov, C. Adler, A. I. Pavlinov, M. B. Tonjes, W. W. Jacobs, V. Morozov, Jeffrey G. Reid, D. Hardtke, R. D. Majka, J. Sowinski, J. Schambach, H. Ward, B. E. Bonner, O. D. Tsai, A. Lebedev, Y. Panebratsev, G. Rai, and J. Klay

Subjects
Nuclear physics, Physics, Particle physics, SIMPLE (dark matter experiment), Flow (mathematics), Transverse momentum, Elliptic flow, General Physics and Astronomy, Particle, Particle flow, Function (mathematics), Star (graph theory), Nuclear Experiment
Abstract

We report first results on elliptic flow of identified particles at midrapidity in Au+Au collisions at √(sNN)= 130 GeV using the STAR TPC at RHIC. The elliptic flow as a function of transverse momentum and centrality differs significantly for particles of different masses. This dependence can be accounted for in hydrodynamic models, indicating that the system created shows a behavior consistent with collective hydrodynamical flow. The fit to the data with a simple model gives information on the temperature and flow velocities at freeze-out.

Published
2001

14. Multiplicity Distribution and Spectra of Negatively Charged Hadrons inAu+AuCollisions atsNN=130GeV

Author

W. Christie, J. Amonett, M. DeMello, A. I. Kulikov, Masashi Kaneta, W. M. Zhang, Andrey Vasiliev, M. Oldenburg, I. Sakrejda, A. C. Saulys, V. Emelianov, D. Keane, J. Engelage, Nikolai Smirnov, R. Stock, J. Mitchell, V. Perevoztchikov, M. M. de Moura, Fuqiang Wang, M. L. Miller, Janet Elizabeth Seger, G. S. Mutchler, A. Stolpovsky, H. Hümmler, L. Kotchenda, J. M. Landgraf, Christophe Pierre Suire, L. G. Efimov, A. Ishihara, R. S. Longacre, M. Strikhanov, Yu. Ivanshin, Guy Paic, A. Chikanian, S. S. Shimanskii, Sergey Panitkin, A. A.P. Suaide, A. Boucham, P. Szarwas, S. Bekele, J. Sandweiss, J. Berger, M. Guedon, A. M. VanderMolen, M. Castro, C. Roy, A. Klyachko, Thomas LeCompte, J. W. Harris, A. H. Tang, B. E. Bonner, C. O. Blyth, A. M. Poskanzer, B. Choi, A. V. Brandin, Vladimir Tikhomirov, O. D. Tsai, B. D. Anderson, S. E. Vigdor, S. Trentalange, V. B. Dunin, V. I. Yurevich, H. G. Ritter, A. Lebedev, G. Igo, Frank Jm Geurts, Alexander Kovalenko, A. Vanyashin, W. S. Deng, Adam Ryszard Kisiel, G. Van Buren, H. J. Crawford, Christian Claude Kuhn, A. S. Hirsch, Mingshui Chen, P. Kravtsov, C. Adler, M. Lopez-Noriega, L. V. Nogach, J. G. Cramer, B. Norman, R. Bellwied, G. Skoro, E. Gushin, G. J. Kunde, A. S. Konstantinov, M. Heffner, D. Russ, G. Eppley, R. K. Kutuev, A. Maliszewski, Jeffrey G. Reid, Yu Chen, E. Sugarbaker, B. Erazmus, K. Turner, H. Z. Huang, V. S. Shvetcov, P. Yepes, V. Eckardt, C. A. Whitten, E. Platner, M. Kramer, S. Margetis, Vladimir Petrov, P. Seyboth, S. P. Chernenko, J. Pluta, W. J. Llope, J. M. Nelson, H. Stroebele, O. A. Grachov, A. Yokosawa, F. Laue, Lee Stuart Barnby, D. M. Moltz, A. A. Kuznetsov, J. H. Thomas, L. Conin, J. Castillo, S. W. Wissink, A. Szanto de Toledo, T. S. McShane, F. Meissner, A. I. Pavlinov, M. B. Tonjes, S. Lange, S. J. Lindenbaum, A. Cardenas, Subhasis Chattopadhyay, K. Krueger, V. M. Leontiev, Olivier Ravel, W. Peryt, B. Lasiuk, M. Tokarev, T. Pawlak, Sergey Voloshin, D. Cebra, C. P. Lansdell, R.J.M. Snellings, V. Morozov, Gerald W Hoffmann, J. Grabski, H. Long, C. E. Allgower, M. Cherney, Thomas Michael Cormier, N. Xu, V. Grigoriev, J. Porter, K. J. Foley, N.D. Gagunashvili, K. Schweda, D.E. Greiner, M. Calderón de la Barca Sánchez, D. Hardtke, R. D. Majka, J. Sowinski, R. Lednický, J. N. Marx, Y. Panebratsev, P. Nevski, S. Radomski, Yu Melnick, G. D. Westfall, V. A. Nikitin, G. Rai, R. L. Ray, E. Potrebenikova, K. E. Shestermanov, Malgorzata Anna Janik, J. Schambach, J. Baudot, A. Ridiger, Y. V. Zanevski, T. J. Humanic, R. Willson, I.A. Savin, N. T. Porile, Q. Li, D. G. Underwood, W. A. Love, P. Leszczynski, S. Heppelmann, D. Flierl, T. Ljubicic, E. G. Judd, I. Zborovský, Morton Kaplan, H. H. Wieman, Yu A. Matulenko, M. Šumbera, V. A. Moiseenko, R. Bossingham, L. Martin, H. Caines, M. Horsley, G. S. Averichev, F. Retiere, V. L. Rykov, B. Stringfellow, J. Klay, C. Struck, Vitaly Okorokov, L. Lakehal-Ayat, J. Lamas-Valverde, D. Seliverstov, A. Schüttauf, J. E. Draper, N. G. Minaev, V. Trofimov, Y. Fisyak, Marcelo Gameiro Munhoz, D. J. Prindle, J. Takahashi, A. Ogawa, Ian Johnson, Peter Martin Jacobs, J. W. Watson, J. P. Coffin, O. V. Rogachevski, J. Balewski, M. A. C. Lamont, S. B. Nurushev, Z. Milosevich, Z. Z. Xu, D. Reichhold, Claude Andre Pruneau, Torre Wenaus, T. Herston, T. Ullrich, T. J. Hallman, T. J. M. Symons, Thomas A. Trainor, E. J. Stephenson, R. Zoulkarneev, M. A. Lisa, H. M. Spinka, R. P. Scharenberg, H. S. Matis, W. W. Jacobs, L. C. Bland, H. Ward, H. Bichsel, G. Odyniec, Matthew J. Anderson, S. U. Pandey, A. E. Yakutin, David Lynn, V. V. Belaga, Peter Graham Jones, J. Fu, B. K. Srivastava, I. M. Vasilevski, L. Didenko, J. Gans, Boris Hippolyte, Marie Germain, S. V. Razin, L. Gaudichet, W. Pinganaud, A. N. Zubarev, Jay Roberts, M. Messer, C. L. Kunz, C. F. Moore, Jinghui Yang, R. Witt, E. Yamamoto, G. LoCurto, S. R. Klein, J. C. Dunlop, O. Barannikova, D. L. Olson, Zubayer Ahammed, M. J. LeVine, A. A. Derevschikov, L. S. Schroeder, R. Wells, N. Schmitz, E. Shahaliev, E. Hjort, J. Carroll, V. Ghazikhanian, J. L. Romero, P. Fachini, E. Finch, and A. P. Meschanin

Subjects
Quark, Physics, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Elementary particle, 01 natural sciences, Spectral line, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, Scaling, Multiplicity distribution
Abstract

The minimum-bias multiplicity distribution and the transverse momentum and pseudorapidity distributions for central collisions have been measured for negative hadrons (h{sup -}) in Au+Au interactions at s{sub NN}=130 GeV . The multiplicity density at midrapidity for the 5% most central interactions is dN{sub h{sup -}}/d{eta}|{sub {eta}=0} =280{+-}1(stat){+-}20(syst) , an increase per participant of 38% relative to p{bar p} collisions at the same energy. The mean transverse momentum is 0.508{+-}0.012 GeV/c and is larger than in central Pb+Pb collisions at lower energies. The scaling of the h{sup -} yield per participant is a strong function of p{sub {perpendicular}} . The pseudorapidity distribution is almost constant within |{eta}

Published
2001

15. BEARS: A radioactive ion beam initiative at LBNL

Author

Ruth-Mary Larimer, D. Wutte, Z. Q. Xie, F. Q. Guo, P. E. Haustein, Eric B. Norman, J. Powell, Henry F. VanBrocklin, X. J. Xu, J. P. O'Neil, Peggy McMahan, R. Joosten, Claude M. Lyneis, J. Cerny, D. M. Moltz, and M. W. Rowe

Subjects
Nuclear physics, Ion beam, Chemistry, law, Physical separation, Cyclotron, Particle accelerator, Atomic physics, National laboratory, Ion source, Electron cyclotron resonance, Isotope separation, law.invention
Abstract

BEARS is an initiative to develop a radioactive ion-beam capability at Lawrence Berkeley National Laboratory. The aim is to produce isotopes at an existing medical cyclotron and to accelerate them at the 88″ Cyclotron. To overcome the 300-meter physical separation of these two accelerators, a carrier-gas transport system will be used. At the terminus of the capillary, the carrier gas will be separated and the isotopes will be injected into the 88″ Cyclotron’s Advanced Electron Cyclotron Resonance ion source. The first radioactive beams to be developed will include 20-min 11C and 70-sec 14O, produced by (p, n) and (p, α) reactions on low-Z targets. Tests at the 88″ Cyclotron lead to projections of initial 11C beams of 2×108 ions/sec 14O beams of 1×106 ions/sec. Construction of BEARS is expected to be completed in the spring of 1999.

Published
1999

16. BEARS: radioactive ion beams at LBNL

Author

Z. Q. Xie, Henry F. VanBrocklin, F. Q. Guo, J. Cerny, D. M. Moltz, X. J. Xu, J. P. O'Neil, M. W. Rowe, Eric B. Norman, Claude M. Lyneis, Ruth-Mary Larimer, R. Joosten, J. Powell, and P. E. Haustein

Subjects
Nuclear physics, Nuclear reaction, law, Chemistry, Cyclotron, Cyclotron resonance, Particle accelerator, Electron cyclotron resonance, Ion source, law.invention, Isotope separation, Ion
Abstract

BEARS (Berkeley Experiments with Accelerated Radioactive Species) is an initiative to develop a radioactive ion-beam capability at Lawrence Berkeley National Laboratory. The aim is to produce isotopes at an existing medical cyclotron and to accelerate them at the 88 inch Cyclotron. To overcome the 300-meter physical separation of these two accelerators, a carrier-gas transport system will be used. At the terminus of the capillary, the carrier gas will be separated and the isotopes will be injected into the 88 inch Cyclotron`s Electron Cyclotron Resonance (ECR) ion source. The first radioactive beams to be developed will include 20-min {sup 11}C and 70-sec {sup 14}O, produced by (p,n) and (p,{alpha}) reactions on low-Z targets. A test program is currently being conducted at the 88 inch Cyclotron to develop the parts of the BEARS system. Preliminary results of these tests lead to projections of initial {sup 11}C beams of up to 2.5 {times} 10{sup 7} ions/sec and {sup 14}O beams of 3 {times} 10{sup 5} ions/sec.

Published
1998

17. The beta-delayed proton decay of

Author

T. J. Ognibene, J. Powell, J. Cerny, D. M. Moltz, and M. W. Rowe

Subjects
Nuclear reaction, Physics, Proton, Physics::Instrumentation and Detectors, Nuclear Theory, chemistry.chemical_element, Beta decay, Particle detector, Semiconductor detector, Nuclear physics, chemistry, Atomic physics, Nuclear Experiment, Nucleon, Helium, Radioactive decay
Abstract

Aluminum-23 was produced in two 40 MeV proton bombardments of Mg targets at LBNL’s 88-Inch Cyclotron. Reaction products were transported by helium jet to a detection chamber. They were observed by two low-energy particle-identification telescopes; each consisted of two gas-ΔE detectors, a thin (

Published
1998

18. Spectroscopic studies near the proton drip line

Author

J. M. Nitschke, D. M. Moltz, P. A. Wilmarth, J. D. Robertson, and K. S. Toth

Subjects
Nuclear reaction, Proton, Isotope, Chemistry, Nuclear Theory, Cyclotron, Oak Ridge National Laboratory, law.invention, Nuclear physics, law, Physics::Accelerator Physics, Nuclide, Alpha decay, Atomic physics, Nuclear Experiment, Radioactive decay
Abstract

We have investigated nuclei close to the proton drip line by using heavy‐ion fusion reactions to produce extremely neutron‐deficient nuclides. Their nuclear decay properties were studied by using on‐line isotope separators at Oak Ridge (UNISOR) and Berkeley (OASIS), the Oak Ridge National Laboratory velocity filter, and a fast helium‐gas‐jet transport system at Lawrence Berkeley Laboratory 88‐inch Cyclotron. Many isotopes, isomers, and β‐delayed‐proton and α‐particle emitters were discovered. This contribution summarizes three topics that are part of our overall program: (a) decay rates of even‐even α‐particle emitters, (b) mass excesses of 181Pb, 182Pb, and 183Pb, and (c) β‐delayed proton emitters near N=82.

Published
1991

19. Exotic Decays at the Proton Drip Line

Author

J. D. Robertson, J. E. Reiff, J. Cerny, D. M. Moltz, and T. F. Lang

Subjects
Nuclear physics, Physics, Proton, Proton decay, Nuclear Theory, Nuclear Experiment, Ground state, Line (formation)
Abstract

In this paper we review the general physics learned at the proton drip line. The extraordinary experimental problems which must be overcome are discussed in addition to several novel solutions. Finally, results of several recent experiments to look for ground state one-and two-proton emission are discussed.

Published
1990

20. Identification of180Pb

Author

J. C. Batchelder, D. M. Moltz, J. D. Robertson, and K. S. Toth

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Mass excess, Decay energy
Abstract

Theα decay of the new isotope180Pb was observed in40Ca bombardments of144Sm:Eα = 7.23(4)MeV, and,T1/2=(4−2+4)ms. With this decay energy and the known mass of176Hg, the mass excess of180Pb was calculated to be −1.98(5)MeV.

Published
1996

21. Identification of 180Pb

Author

J. C. Batchelder, J. D. Robertson, D. M. Moltz, and K. S. Toth

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Mass excess, Decay energy, Isotope, Nuclear fusion, Atomic physics
Abstract

The α decay of the new isotope 180Pb was observed in 40Ca bombardments of 144Sm: E α = 7.23(4) MeV, and, \({T_{1/2}} = \left( {4_{ - 2}^{ + 4}} \right){\text{ ms}}\). With this decay energy and the known mass of 176Hg, the mass excess of 180Pb was calculated to be −1.98(5) MeV.

Published
1996

22. Observation of the FirstTz=−52Nuclide,Ca35, via Itsβ-Delayed Two-Proton Emission

Author

X. J. Xu, Joseph Cerny, D. M. Moltz, J. E. Reiff, and J. Äystö

Subjects
Nuclear reaction, Nuclear physics, Physics, Excited state, Isotopes of chlorine, General Physics and Astronomy, Alpha particle, Proton emission, Atomic physics, Nuclear Experiment, Nucleon, Ground state, Energy (signal processing)
Abstract

The decay of the $T=\frac{5}{2}$ isobaric analog state in $^{35}\mathrm{K}$ at 9053 \ifmmode\pm\else\textpm\fi{} 45 keV, fed by the superallowed $\ensuremath{\beta}$ decay of 50 \ifmmode\pm\else\textpm\fi{} 30-ms $^{35}\mathrm{Ca}$, results in two-proton emission to both the ground and the first excited states of $^{33}\mathrm{Cl}$. The measured energy correlations between the two decay protons indicate a sequential-decay mechanism. From the isobaric-multiplet mass equation, a mass excess of 4453 \ifmmode\pm\else\textpm\fi{} 60 keV can be predicted for the ground state of $^{35}\mathrm{Ca}$.

Published
1985

23. Masses ofKr76andKr74

Author

D. M. Moltz, J. P. Sullivan, K. S. Toth, Robert E. Tribble, and R. E. Neese

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Light nucleus, Isotope, Q value, Krypton, Isotopes of krypton, chemistry.chemical_element, Isotopes of rubidium, Nuclear physics, chemistry, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Atomic physics, Isotopes of helium
Abstract

The masses of /sup 76/Kr and /sup 74/Kr were measured utilizing the /sup 78/Kr(/sup 4/He,/sup 6/He) and /sup 78/Kr(/sup 4/He,/sup 8/He) reactions. Mass excesses of -68971 +- 13 and -62210 +- 75 keV were obtained for /sup 76/Kr and /sup 74/Kr, respectively, and found to compare favorably with some mass formulae predictions, but not with others. Speculations about shape differences in light krypton and rubidium isotopes are presented as they relate to various mass formulae.

Published
1982

24. Improvements to the helium-jet coupled on-line mass separator RAMA

Author

Thomas Lang, W.F. Knoll, F. Blonnigen, Michael Hotchkis, X. J. Xu, D. M. Moltz, Joseph Cerny, and J. E. Reiff

Subjects
Nuclear physics, Nuclear and High Energy Physics, Jet (fluid), Chemistry, law, Analytical chemistry, Separator (oil production), chemistry.chemical_element, Instrumentation, Helium, Line (formation), Isotope separation, law.invention
Abstract

Some general improvements to the on-line mass separator RAMA have yielded a factor of five increase in yield for most elements. By placing the ion-source region at the full accelerating potential of 20 kV, the effective skimmer-plasma distance has been reduced from 12 to

Published
1987

25. Decay of a new isotope, 24Si: A test of the isobaric multiplet mass equation

Author

Joseph Cerny, M. D. Cable, R. D. von Dincklage, R.F. Parry, D. M. Moltz, J.M. Wouters, and J. Äystö

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Mass excess, Nuclear Theory, Mass formula, Nuclear physics, Isobaric process, Nuclide, Atomic physics, Nuclear Experiment, Nucleon, Multiplet, Radioactive decay
Abstract

Observation of beta-delayed protons from the decay of the mass separated T z =−2 nuclide 24 Si (t 1 2 ≈100 ms ) establishes the mass excess of the lowest T =2 (0 + ) state in 24 Al (5903±9 KeV). An excellent fit to the quadratic form of the isobaric multiplet mass equation is obtained.

Published
1979

26. Search for axions from the 1115-keV transition ofCu65

Author

W. C. Haxton, Richard T. Kouzes, F. T. Avignone, C. Baktash, D. M. Moltz, W. C. Barker, R. W. Dunford, Frank Calaprice, Harry S. Miley, and D. Kahana

Subjects
Baryon, Physics, Nuclear physics, Particle physics, Physics::Instrumentation and Detectors, Elementary particle, Fermion, Electron, Nucleon, Coupling (probability), Axion, Particle identification
Abstract

Two independent axion searches have been carried out near a well-shielded radioactive $^{65}\mathrm{Zn}$ source (\ensuremath{\sim}15 kCi). One experiment used four NaI(Tl) scintillators to detect coincident photons generated in the decay a\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}. The second used a shielded 145-${\mathrm{cm}}^{3}$ low-background intrinsic-Ge detector to detect single photons produced by axion ``Compton'' interactions with detector electrons and by Primakoff conversion off Ge nuclei and off Pb nuclei in the detector shield. We determine general constraints imposed by these experiments on axions that couple to nucleons and to either the electron or two photons. In the case of light axions, the limits obtained in the second experiment are new. For the standard axion, we determine the ranges of ${f}_{\ensuremath{\varphi}}$ and X that are ruled out by our measurements.

Published
1988

27. Beta-delayed proton decay ofGe61

Author

Michael Hotchkis, D. J. Vieira, Thomas Lang, J. E. Reiff, X. J. Xu, Joseph Cerny, D. M. Moltz, and F. Blonnigen

Subjects
Nuclear physics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Isotopes of germanium, Proton, Hadron, Proton emission, Atomic physics, Ground state, Nucleon, Radioactive decay
Abstract

The ${T}_{z}$=-(3/2), A=4n+1 nuclide $^{61}\mathrm{Ge}$ has been produced via the $^{40}\mathrm{Ca}$${(}^{24}$Mg,3n) reaction and identified by its beta-delayed proton emission. A single proton group at 3.11\ifmmode\pm\else\textpm\fi{}0.03 MeV with ${t}_{1/2}$=40\ifmmode\pm\else\textpm\fi{}15 ms has been observed, corresponding to decay of the T=(3/2) isobaric analog state in $^{61}\mathrm{Ga}$ to the ground state of $^{60}\mathrm{Zn}$. Searches for the beta-delayed proton decay of the next member of this series, $^{65}\mathrm{Se}$, to be produced by the $^{40}\mathrm{Ca}$${(}^{28}$Si,3n) reaction, have proven unsuccessful.

Published
1987

28. Single-particle states insup149Er andsup149Ho, and the effect of theZ=64closure

Author

Y. A. Ellis-Akovali, Phillip A. Wilmarth, J. M. Nitschke, D. C. Sousa, R. S. Moore, D. M. Moltz, F. T. Avignone, P. K. Lemmertz, Alan L. Goodman, and K. S. Toth

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Proton, Closure (topology), Particle, Neutron, Atomic physics, Spectroscopy
Abstract

The decay of sup149Er was investigated by \ensuremath{\gamma}-ray spectroscopy. Based on these measurements the ssub1/2, dsub3/2, and hsub11/2 neutron states in sup149Er and the ssub1/2, dsub3/2, dsub5/2, and gsub7/2 proton states in sup149Ho were identified. A systematic examination of these proton states in N=82 isotones indicates a modest closure at Z=64, rather than a major one as suggested previously. Spherical Hartree-Fock-Bogolyubov calculations for even-Z N=81 and odd-Z N=82 nuclei are compared with experiment.

Published
1985

29. A fast in-beam recoil catcher wheel and the observation of beta-delayed two-proton emission from 31Ar

Author

J.D. Robertson, Thomas Lang, D. M. Moltz, J. E. Reiff, Michael Hotchkis, and Joseph Cerny

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Range (particle radiation), Recoil, Proton, Beta (plasma physics), Nuclide, Proton emission, Spectroscopy, Instrumentation, Beam (structure)
Abstract

A fast in-beam recoil catcher wheel has been constructed to perform particle spectroscopy on very proton-rich nuclei. The wheel speed can be varied to study nuclides whose half-lives range from 100 μs to ∼ 200 ms. Known beta-delayed proton emissions from the A = 4n + 1, T z = −3 2 nuclides 17 Ne, 21 Mg, and 25 Si as well as the beta-delayed two-proton decay from 22 Al( t 1 2 = 70 ms ) were measured to test the wheel. Subsequently, a beta-delayed two-proton branch from 31 Ar ( t 1 2 = 15 ms ) was observed.

Published
1989

30. The Use of Ge Detectors for Precision Positron-Endpoint Measurements of Short Lived Nuclei

Author

K. S. Toth, D. M. Moltz, B.D. Kern, H. Noma, and F. T. Avignone

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Positron, Annihilation, Nuclear Energy and Engineering, Scattering, Monte Carlo method, Detector, Bremsstrahlung, Electrical and Electronic Engineering, Particle detector, Semiconductor detector
Abstract

A brief review of the development and application of techniques for measuring positron endpoint energies using intrinsic Ge detectors is given. The calculation of detector response functions using Monte Carlo methods is discussed. Multiple scattering, bremsstrahlung, photo-electron escape and interference from annihilation radiations are considered. The techniques were tested using well known endpoints of the decays of 27Si, 58Cu and 64Ga. Q-values were determined for mass-separated samples of 76,77Rb and 77Kr produced in heavy ion reactions.

Published
1983

31. Decay ofEr150

Author

J.D. Cole, K. S. Toth, Y. A. Ellis-Akovali, and D. M. Moltz

Subjects
Physics, Nuclear reaction, Nuclear physics, Rare earth nuclei, Nuclear and High Energy Physics, Particle properties, Isotope, Analytical chemistry, Half-life, Nuclide, Beta decay, Excitation
Abstract

A new activity, T/sub 1/2/ = 20 +- 2 sec, was observed in /sup 12/C bombardments of /sup 144/Sm. Only one ..gamma.. ray, 476.0 +- 0.1 keV, was found to be associated with this nuclide. We identify the new isotope as /sup 150/Er and propose that it decays mainly to one level in /sup 150/Ho at an excitation energy of approx.476 keV by an allowed ..beta.. transition which connects states with the following configurations: O/sup +/(..pi..h/sub 11/2/, ..pi..h/sub 11/2/)..-->..1/sup +/(..pi..h/sub 11/2/,..nu..h/sub 9/2/). As part of the investigation, the decay properties of the high- and low-spin /sup 150/Ho isomers were reexamined.

Published
1982

32. Completion of the Mass-20 Isospin Quintet by Employing a Helium-Jet-Fed On-Line Mass Separator

Author

D. M. Moltz, R.F. Parry, R. D. von Dincklage, M. D. Cable, Joseph Cerny, J.M. Wouters, and J. Äystö

Subjects
Nuclear reaction, Physics, Mass excess, Nuclear Theory, Hadron, General Physics and Astronomy, Quadratic form (statistics), Nuclear physics, Mass formula, Isospin, Atomic physics, Nuclear Experiment, Nucleon, Multiplet
Abstract

Observation of $\ensuremath{\beta}$-delayed protons from the decay of the mass-separated ${T}_{z}=\ensuremath{-}2$ nuclide $^{20}\mathrm{Mg}$ (${t}_{\frac{1}{2}}\ensuremath{\sim}95$ ms) establishes the mass excess of the lowest $T=2({0}^{+})$ state in $^{20}\mathrm{Na}$ (13.42 \ifmmode\pm\else\textpm\fi{} 0.05 MeV), thereby completing the mass-20 isospin quintet. All members of this multiplet are bound to isospin-allowed particle-decay modes, providing the first test of the isobaric multiplet mass equation for such a quintet. Excellent agreement is observed using only the quadratic form of this equation.

Published
1979

34. Development of the helium-jet fed on-line mass separator RAMA, I

Author

J.M. Wouters, D. M. Moltz, M. D. Cable, R. D. von Dincklage, Joseph Cerny, J. Äystö, and R.F. Parry

Subjects
Nuclear physics, Physics, Recoil, chemistry, Transport activity, Total efficiency, Melting point, chemistry.chemical_element, Separator (oil production), General Medicine, Mass analysis, Helium, Atomic mass
Abstract

Development of general experimental systems capable of mass analysis of radioactive species with half-lives as short as 50 ms and with simple application to a vast majority of the chemical elements is clearly of great interest in the study of nuclei far from stability. Such an on-line system has been developed which employs a helium-jet to transport activity from the target area to a mass separator. The initial development and early experiment use of this recoil atom mass analysis system (RAMA) are described. RAMA as a typical total efficiency of 0.01%, which should apply to ∼75 elements of melting point M ΔM ∼ 200 .

Published
1980

35. Identification ofPb182inCa40irradiations ofSm147

Author

F. Blonnigen, D. M. Moltz, K. S. Toth, and F. T. Avignone

Subjects
Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Mass excess, Isotope, Branching fraction, Analytical chemistry, Half-life, Alpha decay
Abstract

The ..cap alpha.. decay of /sup 182/Pb was identified in bombardments of /sup 147/Sm with /sup 40/Ca ions. Its ..cap alpha..-decay energy and half-life were determined to be 6.919 +- 0.015 MeV and 55/sub -35//sup +40/ ms, respectively. The nuclidic assignment was based on excitation-function and cross-bombardment (/sup 39/K+/sup 147/Sm) data and on decay-energy systematics. From the known mass of /sup 178/Hg and the 6.919-MeV ..cap alpha..-decay energy we deduce the mass excess of /sup 182/Pb to be (-6823 +- 25) keV. Also, a half-life of 300 +- 80 ms was measured for /sup 183/Pb.

Published
1987

36. Beta-delayed two-proton emission as a nuclear probe

Author

Joseph Cerny, Thomas Lang, J.D. Robertson, J. E. Reiff, and D. M. Moltz

Subjects
Nuclear reaction, Nuclear physics, Baryon, Physics, Isotope, Beta (plasma physics), Nuclear Theory, Hadron, Elementary particle, Atomic physics, Proton emission, Nuclear Experiment, Nucleon
Abstract

A brief history of beta‐delayed two‐proton emission is given. Speculations about future experiments which would enhance our knowledge about both nuclear spectroscopy and this relatively unique decay mode are presented.

Published
1987

37. Trends in the study of light proton rich nuclei

Author

Michael Hotchkis, J. Aysto, D. M. Moltz, and Joseph Cerny

Subjects
Physics, Nuclear physics, Nuclear reaction, Proton, Hadron, Elementary particle, Nuclide, Fermion, Nucleon, Spectral line
Abstract

Recent work in light proton-rich nuclei is reviewed. Evidence for the first T/sub z/ = -5/2 nuclide, /sup 35/Ca, is presented. The mechanisms of two-proton emission following beta-decay is investigated. Future directions in this field are discussed. 23 refs., 5 figs. (WRF)

Published
1985

38. Radioactivities with 146≤A≤152 investigated at the OASIS facility; evidence for 147Tm β-decay

Author

J. M. Nitschke, Y.A. Ellis-Akovali, N. M. Rao, D. C. Sousa, K. S. Toth, P. A. Wilmarth, D. M. Moltz, J. Gilat, and K. Vierinen

Subjects
Nuclear physics, Chemistry, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Radiochemistry, Physics::Accelerator Physics, Positron emission, Oak Ridge National Laboratory, Nuclear Experiment, X ray spectra, Beta decay
Abstract

A study of short‐lived nuclei near the 82‐neutron shell has been performed over the past two years at the SuperHILAC OASIS facility of Oak Ridge National Laboratory. Measurements of gamma, x‐ray, and positron emission in coincidence with protons have been made and are discussed. (AIP)

Published
1987

39. Studies of Isospin Quintets and Neutron-Deficient Indium Isotopes with the On-Line Mass Analysis System Rama

Author

J.M. Wouters, P.E. Haustein, R.F. Parry, M. D. Cable, J. Äystö, D. M. Moltz, Joseph Cerny, and R. D. von Dincklage

Subjects
Nuclear physics, Mass excess, Isotope, Chemistry, Beta (plasma physics), Isospin, Nuclear Theory, Neutron, Nuclear Experiment, Radioactive decay, Line (formation), Characterization (materials science)
Abstract

The characterization of the nuclidic mass in those regions which are far removed from the line of beta stability is of fundamental importance for testing and improving mass theories. An increasing component of our knowledge on nuclear properties of light exotic nuclei is derived from the analysis of mass-separated radioactivity, complementing the much more extensive investigations by this technique of heavy nuclei off the stability line.1 Such studies provide new insights into the limits of nuclear stability, the behavior of nuclear shapes and the onset of new radioactive decay modes.

Published
1980

40. Evidence fromαDecay thatZ=82Is Not Magic for Light Pb Isotopes

Author

H. K. Carter, D. M. Moltz, R. L. Mlekodaj, E. H. Spejewski, C. R. Bingham, D. C. Sousa, K. S. Toth, and Y. A. Ellis-Akovali

Subjects
Nuclear physics, Physics, Isotope, Branching fraction, SHELL model, Mercury Isotopes, General Physics and Astronomy, Anomalous behavior, Alpha decay, Atomic number, X ray spectra
Abstract

To resolve the reported anomalous behavior of the $\ensuremath{\alpha}$-decay rates of $^{186,188,190,192}\mathrm{Pb}$ we determined more accurate $\ensuremath{\alpha}$-decay branches for these isotopes. Our data result in $\ensuremath{\alpha}$-decay reduced widths whose dependence on $N$ is similar to that observed for other elements. However, contrary to the expectation of a shell effect at $Z=82$, this new information indicates lead nuclei to be less hindered toward $\ensuremath{\alpha}$ decay than mercury isotopes. It appears that midway between $N=82$ and $N=126$ the proton number of 82 is not magic.

Published
1984

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