Search

Your search keyword '"Saren, J."' showing total 23 results
Start Over Author "Saren, J." Topic [phys.nexp]physics [physics]/nuclear experiment [nucl-ex]
23 results on '"Saren, J."'

1. Tilted precession bands in $^{135}$Nd

Author

Lv, B.F., Petrache, C.M., Lawrie, E.A., Astier, A., Dupont, E., Zheng, K.K., Greenlees, P., Badran, H., Calverley, T., Cox, D.M., Grahn, T., Hilton, J., Julin, R., Juutinen, S., Konki, J., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Uusitalo, J., Cederwall, B., Ertoprak, A., Liu, H., Guo, S., Wang, J.G., Ong, H.J., Zhou, X.H., Sun, Z.Y., Kuti, I., Timár, J., Tucholski, A., Srebrny, J., Andreoiu, C., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ydinfysiikka, Nuclear Structure
Abstract

International audience; Two new excited bands built on the πh11/2 configuration have been identified in Nd135 in addition to the known πh11/2 band. The energy spectra of the excited bands and the available electromagnetic transition probabilities are in good agreement with theoretical results obtained using quasiparticle-plus-triaxial-rotor model calculations. The properties of the bands identify them as tilted precession bands instead of wobbling bands. Our results give a new insight into the interpretation of the low-lying bands in odd-A mass nuclei, and can stimulate future studies to address the nuclear triaxiality.

Published
2021
Full Text
View/download PDF

2. First candidates for $\gamma$ vibrational bands built on the $[505]11/{2}^{-}$ neutron orbital in odd-$A$ Dy isotopes

Author

MAJOLA, S.N.T., SITHOLE, M.A., MDLETSHE, L., HARTLEY, D., TIMÁR, J., NYAKÓ, B.M., ALLMOND, J.M., BARK, R.A., BEAUSANG, C., BIANCO, L., BUCHER, T.D., BVUMBI, S.P., CARPENTER, M.P., CHIARA, C.J., COOPER, N., CULLEN, D.M., CURIEN, D., DINOKO, T.S., GALL, B.J.P., GARRETT, P.E., GREENLEES, P.T., HIRVONEN, J., JAKOBSSON, U., JONES, P.M., JULIN, R., JUUTINEN, S., KETELHUT, S., KHESWA, B.V., KONDEV, F.G., KORICHI, A., KULP, W.D., LAURITSEN, T., LAWRIE, E.A., MAKHATHINI, L., MASITENG, P.L., MAQABUKA, B., MCCUTCHAN, E.A., MILLER, D., MILLER, S., MINKOVA, A., MSEBI, L., MTHEMBU, S.H., NDAYISHIMYE, J., NIEMINEN, P., NGCOBO, P.Z., NTSHANGASE, S.S., ORCE, J.N., PEURA, P., RAHKILA, P., REDON, N., RIEDINGER, L.L., RILEY, M.A., ROUX, D.G., RUOTSALAINEN, P., PIOT, J., SAREN, J., SHARPEY-SCHAFER, J.F., SCHOLEY, C., SHIRINDA, O., SIMPSON, J., SORRI, J., STEFANESCU, I., STOLZE, S., UUSITALO, J., WANG, X., WERNER, V., WOOD, J.L., YU, C.H., ZHU, S., ZIMBA, G., Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure, Nuclear Experiment
Abstract

Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd({\alpha},2n)157Dy and 148Nd(12C, 5n)155Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a K{\pi}= 2+ {\gamma} vibrational band, built on the [505]11/2- neutron orbital, in both odd-A 155, 157Dy isotopes. The coupling of the first excited K=0+ states or the so-called \b{eta} vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2- orbital, to produce a K{\pi}=11/2- band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed., Comment: Published in Physical Rev C

Published
2020
Full Text
View/download PDF

3. Signatures of enhanced octupole correlations at high spin in $^{136}\mathrm{Nd}$

Author

Petrache, C.M., Minkov, N., Nakatsukasa, T., Lv, B.F., Astier, A., Dupont, E., Zheng, K.K., Greenlees, P., Badran, H., Calverley, T., Cox, D.M., Grahn, T., Hilton, J., Julin, R., Juutinen, S., Konki, J., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Uusitalo, J., Cederwall, B., Ertoprak, A., Liu, H., Guo, S., Liu, M.L., Wang, J.G., Zhou, X.H., Kuti, I., Timár, J., Tucholski, A., Srebrny, J., Andreoiu, C., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, Physics::Accelerator Physics, Physics::Atomic Physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure
Abstract

International audience; Experimental signatures of moderately enhanced octupole correlations at high spin in Nd136 are indicated for the first time. The extracted dipole moments of two negative-parity bands are only two times smaller than those of the lanthanide nuclei with N≈90 which present well-established octupole correlations. Calculations using the cranked quasiparticle random phase approximation and a model of quadrupole-octupole rotations with octupole vibrations reveal the structure of the bands and the enhanced octupole correlations at high spin in Nd136.

Published
2020
Full Text
View/download PDF

4. Spectroscopy of low-spin states in $^{157}\mathrm{Dy}$: Search for evidence of enhanced octupole correlations

Author

Majola, S.N.T., Bark, R.A., Bianco, L., Bucher, T.D., Bvumbi, S.P., Cullen, D.M., Garrett, P.E., Greenlees, P.T., Hartley, D., Hirvonen, J., Jakobsson, U., Jones, P.M., Julin, R., Juutinen, S., Ketelhut, S., Kheswa, B.V., Korichi, A., Lawrie, E.A., Masiteng, P.L., Maqabuka, B., Mdletshe, L., Minkova, A., Ndayishimye, J., Nieminen, P., Newman, R., Nyakó, B.M., Ntshangase, S.S., Peura, P., Rahkila, P., Riedinger, L.L., Riley, M., Roux, D., Ruotsalainen, P., Saren, J., Sharpey-Schafer, J.F., Scholey, C., Shirinda, O., Sithole, A., Sorri, J., Stolze, S., Timár, J., Uusitalo, J., Zimba, G., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Nuclear Theory (nucl-th), Nuclear Theory, nuclear spin and parity, shell model, FOS: Physical sciences, collective levels, collective models, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ydinfysiikka, Nuclear Structure, nuclear structure and decays, Nuclear Experiment
Abstract

Low-spin states of 157Dy have been studied using the JUROGAM II array, following the 155Gd ({\alpha}, 2n) reaction at a beam energy of 25 MeV. The level scheme of 157Dy has been expanded with four new bands. Rotational structures built on the [523]5/2- and [402]3/2+ neutron orbitals constitute new additions to the level scheme as do many of the inter- and intra-band transitions. This manuscript also reports the observation of cross I- to (I-1)- and I- to (I-1)+ E1 dipole transitions inter-linking structures built on the [523]5/2- (band 5) and [402]3/2+ (band 7) neutron orbitals. These interlacing band structures are interpreted as the bands of parity doublets with simplex quantum number s = -i related to possible octupole correlations., Comment: Published in Physical Review C (2019)

Published
2019
Full Text
View/download PDF

5. Production cross section and decay study of $^{243}$Es and $^{249}$Md

Author

Briselet, R., Theisen, Ch., Vandebrouck, M., Marchix, A., Airiau, M., Auranen, K., Badran, H., Boilley, D., Calverley, T., Cox, D., Déchery, F., Defranchi Bisso, F., Drouart, A., Gall, B., Goigoux, T., Grahn, T., Greenlees, P.T., Hauschild, K., Herzan, A., Herzberg, R.D., Jakobsson, U., Julin, R., Juutinen, S., Konki, J., Leino, M., Lightfoot, A., Lopez-Martens, A., Mistry, A., Nieminen, P., Pakarinen, J., Papadakis, P., Partanen, J., Peura, P., Rahkila, P., Rubert, J., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Sulignano, B., Uusitalo, J., Ward, A., Zielińska, M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ydinreaktiot, alpha decay, Nuclear Reactions, FOS: Physical sciences, low and intermediate energy heavy-ion reactions, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

In the study of the odd-$Z$, even-$N$ nuclei $^{243}$Es and $^{249}$Md, performed at the University of Jyv\"askyl\"a, the fusion-evaporation reactions $^{197}$Au($^{48}$Ca,2$n$)$^{243}$Es and $^{203}$Tl($^{48}$Ca,2$n$)$^{249}$Md have been used for the first time. Fusion-evaporation residues were selected and detected using the RITU gas-filled separator coupled with the focal-plane spectrometer GREAT. For $^{243}$Es, the recoil decay correlation analysis yielded a half-life of $24 \pm 3$s, and a maximum production cross section of $37 \pm 10$ nb. In the same way, a half-life of $26 \pm 1$ s, an $\alpha$ branching ratio of 75 $\pm$ 5%, and a maximum production cross section of 300 $\pm$ 80 nb were determined for $^{249}$Md. The decay properties of $^{245}$Es, the daughter of $^{249}$Md, were also measured: an $\alpha$ branching ratio of 54 $\pm$ 7% and a half-life of 65 $\pm$ 6 s. Experimental cross sections were compared to the results of calculations performed using the KEWPIE2 statistical fusion-evaporation code.

Published
2019
Full Text
View/download PDF

6. In-beam spectroscopic study of $^{244}$Cf

Author

Konki, J., Sulignano, B., Greenlees, P. T., Theisen, Ch., Auranen, K., Badran, H., Briselet, R., Cox, D. M., Bisso, F. Defranchi, Dobaczewski, Jacek Jan, Grahn, T., Herzan, A., Herzberg, R.-D., Julin, R., Juutinen, S., Khuyagbaatar, J., Leino, M., Lightfoot, A., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Sandzelius, M., Saren, J., Scholey, C., Shi, Y., Smolen, M., Sorri, J., Stolze, S., Uusitalo, J., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
level densities, alpha decay, electromagnetic transitions, Nuclear Theory, lifetimes, widths, ddc:530, energy levels, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ydinfysiikka, Nuclear Experiment
Abstract

The ground-state rotational band of the neutron-deficient californium ( Z = 98 ) isotope 244 Cf was identified for the first time and measured up to a tentative spin and parity of I π = 20 + . The observation of the rotational band indicates that the nucleus is deformed. The kinematic and dynamic moments of inertia were deduced from the measured γ -ray transition energies. The behavior of the dynamic moment of inertia revealed an up-bend due to a possible alignment of coupled nucleons in high- j orbitals starting at a rotational frequency of about ℏ ω = 0.20 MeV . The results were compared with the systematic behavior of the even-even N = 146 isotones as well as with available theoretical calculations that have been performed for nuclei in the region. peerReviewed

Published
2018
Full Text
View/download PDF

7. Evolution from $\gamma$-soft to stable triaxiality in $^{136}\mathrm{Nd}$ as a prerequisite of chirality

Author

Lv, B.F., Petrache, C.M., Astier, A., Dupont, E., Lopez-Martens, A., Greenlees, P.T., Badran, H., Calverley, T., Cox, D.M., Grahn, T., Hilton, J., Julin, R., Juutinen, S., Konki, J., Leino, M., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Uusitalo, J., Herzán, A., Cederwall, B., Ertoprak, A., Liu, H., Guo, S., Liu, M.L., Qiang, Y.H., Wang, J.G., Zhou, X.H., Kuti, I., Timár, J., Tucholski, A., Srebrny, J., Andreoiu, C., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure
Abstract

International audience; The level structure of Nd136 has been investigated using the Mo100(Ar40,4n) reaction and the JUROGAM II+RITU+GREAT setup. The level scheme has been extended significantly. Many new bands have been identified both at low and high spin, among which are five nearly degenerate bands interpreted as chiral partners. Excitation energies, spins, and parities of the previously known bands are revised and firmly established, and some previously known bands have been revised. Configurations are assigned to the observed bands based on cranked Nilsson-Strutinsky calculations. The band structure of Nd136 is now clarified and the various types of single-particle and collective excitations are well understood.

Published
2018
Full Text
View/download PDF

8. Oblately deformed isomeric proton-emitting state in Lu-151

Author

Taylor, M.J., Cullen, D.M., Procter, M.G., Smith, A.J., McFarlane, A., Twist, V., Alharshan, G.A., Ferreira, L.S., Maglione, E., Auranen, K., Grahn, T., Greenlees, P.T., Hauschild, K., Herzan, A., Jakobsson, U., Julin, R., Juutinen, S., Ketelhut, S., Konki, J., Leino, M., Lopez-Martens, A., Pakarinen, J., Partanen, J., Peura, P., Rahkila, P., Rinta-Antila, S., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Uusitalo, J., Doncel, M., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS]Physics [physics], NUCLEI, Physical Sciences, Nuclear Theory, TOTAL DATA READOUT, Fysik, Physics::Accelerator Physics, DRIP-LINE, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], DECAY, GAMMA-RAY SPECTROSCOPY
Abstract

International audience; Gamma rays from excited states feeding a proton-emitting isomeric-state in Lu-151 have been observed for the first time. Comparison with state-of-the-art nonadiabatic quasiparticle calculations indicates an oblately deformed, 3/2(+) proton-emitting state with a quadrupole deformation of beta(2) = -0.11. The calculations suggest an increase in quadrupole deformation, to beta(2) = -0.18, with increasing spin which is understood in terms of the mixing of Nilsson states at the Fermi surface. It is also shown that the proton decay half-life is consistent with that from a 3/2(+) state with a quadrupole deformation of beta(2) = -0.12.

Published
2015
Full Text
View/download PDF

9. Spectroscopy of At-201 including the observation of a shears band and the 29/2(+) isomeric state

Author

Auranen, K., Uusitalo, J., Juutinen, S., Jakobsson, U., Grahn, T., Greenlees P., T., Hauschild, K., Herzan, A., Julin, R., Konki, J., Leino, M., Pakarinen, J., Partanen, J., Peura, P., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
MECHANISM, COEXISTENCE, [PHYS]Physics [physics], MASS NUCLEI, MAGNETIC ROTATION, TOTAL DATA READOUT, DETECTORS, ISOTOPES, HIGH-SPIN STATES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], LIFETIMES, GAMMA-RAY SPECTROSCOPY
Abstract

International audience; The excited states of At-201 were studied and an isomeric 29/2(+) state [T-1/2 = 3.39(9) mu s] was identified by using a fusion-evaporation reaction, a gas-filled recoil separator, and recoil gating techniques. The 29/2(+) state is suggested to originate from the pi(h(9/2)) circle times vertical bar Po-200; 11(-)> configuration, and it decays through the 269-and 339-keV E2-and E3-type transitions, respectively. Moreover, a cascade of magnetic dipole transitions that is suggested to originate from a shears band was observed by using recoil-gated gamma- gamma(-gamma) coincidence techniques.

Published
2015
Full Text
View/download PDF

10. Experimental study of 1/2(+) isomers in At-199,At-201

Author

Auranen, K., Uusitalo, J., Juutinen, S., Jakobsson, U., Grahn, T., Greenlees, P.T., Hauschild, K., Herzan, A., Julin, R., Konki, J., Leino, M., Pakarinen, J., Partanen, J., Peura, P., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
isotoopit, GE, TOTAL DATA READOUT, ALPHA-DECAY, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear-data sheets, COEXISTENCE, NUCLEAR-DATA SHEETS, STATES, BI, DETECTORS, ISOTOPES, alpha-decay, BEHAVIOR
Abstract

Using fusion-evaporation reactions, a gas-filled recoil separator, and recoil-electron and recoil-electron-alpha tagging techniques, a new isomeric 1/2(+) state [T-1/2 = 45(3) ms] in At-201 is identified, and an earlier reported corresponding state [T-1/2 = 273(9) ms] in At-199 is confirmed. The 1/2(+) state is suggested to originate from an intruder pi(s(1/2))(-1) configuration. In addition, nuclear structure of states below and above this 1/2(+) state are studied in both nuclei. The isomer decays through a cascade of an E3 transition followed by a mixed M1/E2 transition to the 9/2(-) ground state, and it is interpreted to be fed from nearly spherical 3/2(+) and 5/2(+) states originating from pi(d(3/2))(-1) and pi(d(5/2))(-1) configurations, respectively.

Published
2014
Full Text
View/download PDF

11. Recoil-beta tagging study of the N = Z nucleus As-66

Author

Ruotsalainen, P., Scholey, C., Julin, R., Hauschild, K., Kaneko, K., Singh, B.S.N., Wadsworth, R., G. Jenkins, D., S. Brock, T., T. Greenlees, P., Henderson, J., Jakobsson, U., Jones, P., Juutinen, S., Ketelhut, S., Leino, M., M. Lumley, N., J. R. Mason, P., Nieminen, P., Nyman, M., Paterson, I., Peura, P., G. Procter, M., Rahkila, P., Saren, J., Sorri, J., Uusitalo, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
IN-BEAM, IDENTIFICATION, HIGH-SPIN, TOTAL DATA READOUT, ISOMERIC STATES, DETECTORS, COULOMB ENERGY DIFFERENCES, BR-70, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], PROTON-DRIP-LINE, COINCIDENCE DATA SETS
Abstract

An in-beam study has been performed to further investigate the known isomeric decays and to identify T = 1 excited states in the medium-heavy N = Z = 33 nucleus As-66. The fusion-evaporation reaction Ca-40(Si-28,pn)As-66 was employed at beam energies of 75 and 83 MeV. The half-lives and ordering of two known isomeric states in As-66 have been determined with improved accuracy. In addition, several prompt gamma-ray transitions from excited states, both bypassing and decaying to the isomeric states in As-66, have been observed. Most importantly, candidates for the 4(+) -> 2(+) and 6(+) -> 4(+) transitions in the T = 1 band have been identified. The results are compared with shell-model calculations using the modern JUN45 interaction in the pf(5/2)g(9/2) model space.

Published
2013
Full Text
View/download PDF

12. Identification of new transitions feeding the high-spin isomers in $^{139}$Nd and $^{140}$Nd nuclei

Author

Vancraeyenest, A., Petrache, C., Guinet, D., T. Greenlees, P., Jakobsson, U., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Nyman, M., Peura, P., Rahkila, P., Ruotsalainen, P., Saren, J., Scholey, C., Sorri, J., Uusitalo, J., Jones, P., Ducoin, C., Lautesse, P., Mancuso, C., Redon, N., Stezowski, O., Désesquelles, P., Leguillon, R., Korichi, A., Zerrouki, T., Curien, D., Takashima, A., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Matière Nucléaire, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS, Experimental Nuclear Physics
Abstract

The population of the high-spin isomers in 139Nd and 140Nd was investigated using the 96Zr(48Ca,xn) reaction and the JUROGAM + RITU + GREAT setup employing the recoil decay tagging technique. Three transitions feeding the 23/2+ isomer in 139Nd and two transitions feeding the 20+ isomer in 140Nd were identified. The newly observed transitions allowed the excitation energy of the isomer to be established in 139Nd and to assign configurations to the states and bands deexcited by the observed transitions in both nuclei. peerReviewed

Published
2013
Full Text
View/download PDF

13. Spectroscopy of the proton drip-line nucleus Fr-203

Author

Jakobsson, U., Juutinen, S., Uusitalo, J., Leino, M., Auranen, K., Enqvist, T., T. Greenlees, P., Hauschild, K., Jones, P., Julin, R., Ketelhut, S., Kuusiniemi, P., Nyman, M., Peura, P., Rahkila, P., Ruotsalainen, P., Saren, J., Scholey, C., Sorri, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
SYSTEMATIC BEHAVIOR, EXCITED-STATES, SHAPE COEXISTENCE, TOTAL DATA READOUT, ALPHA-DECAY, HIGH-SPIN STATES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], COINCIDENCE DATA SETS, DATA SHEETS, GAMMA-RAY SPECTROSCOPY, INTRUDER STATES
Abstract

The nucleus Fr-203 has been studied through gamma-ray and electron spectroscopy, using the recoil-decay tagging technique. A 13/2(+) state, with a half-life of 0.37(5) mu s, has been observed in Fr-203. Both the alpha-decay branch and the internal de-excitation of the 1/2(+) isomer in Fr-203 have been studied. Furthermore, the corresponding 1/2(+) state, with a half-life of 0.31(8) s, has been found in At-199. In addition, transitions feeding the 9/2(-) ground state of Fr-203 have been identified. The observed level pattern suggests that the ground state is still spherical.

Published
2013
Full Text
View/download PDF

14. Octupole correlations in the structure of 0(2)(+) bands in the N=88 nuclei Sm-150 and Gd-152

Author

P. Bvumbi, S., F. Sharpey-Schafer, J., M. Jones, P., M. Mullins, S., M. Nyako, B., Juhasz, K., A. Bark, R., Bianco, L., M. Cullen, D., Curien, D., E. Garrett, P., T. Greenlees, P., Hirvonen, J., Jakobsson, U., Kau, J., Komati, F., Julin, R., Juutinen, S., Ketelhut, S., Korichi, A., A. Lawrie, E., Lawrie, J.J., Leino, M., E. Madiba, T., N. T. Majola, S., Maine, P., Minkova, A., J. Ncapayi, N., Nieminen, P., Peura, P., Rahkila, P., L. Riedinger, L., Ruotsalainen, P., Saren, J., Scholey, C., Sorri, J., Stolze, S., Timar, J., Uusitalo, J., A. Vymers, P., Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
STATES, ND-148, DEFORMATION, MOMENTS, SHAPES, ISOTOPES, NEUTRON, TABLE, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], DECAY, LOW-LYING O
Abstract

Knowledge of the exact microscopic structure of the 0(1)(+) ground state and first excited 0(2)(+) state in Sm-150 is required to understand the branching of double beta decay to these states from Nd-150. The detailed spectroscopy of Sm-150 and Gd-152 has been studied using (alpha, xn) reactions and the gamma-ray arrays AFRODITE and JUROGAM II. Consistently strong E1 transitions are observed between the excited K-pi = 0(2)(+) bands and the lowest negative parity bands in both nuclei. These results are discussed in terms of the possible permanent octupole deformation in the first excited K-pi = 0(2)(+) band and also in terms of the "tidal wave" model of Frauendorf. DOI: 10.1103/PhysRevC.87.044333

Published
2013
Full Text
View/download PDF

15. Progressing toward the spectroscopy of heavier elements

Author

Piot, J., Lemagnen, F., Canet, C., Barué, C., Dupuis, M., Osmond, B., Flambard, J.L., Frigot, R., Gall, B.J.P., Rubert, J., Asfari, Z., Medina, P., Dorvaux, O., Chambit, M., Charles, L., Dritsa, C., Ouadi, A., Richer, M., Santos, C., Greenlees, P.T., Arje, J., Seppala, R., Jones, P., Peura, P., Jakobsson, U., Julin, R., Juutinene, S., Ketelhut, S., Koivisto, H., Leino, M., Nyman, M., Pakarinen, J., Rahkilla, P., Ruotsainen, P., Saren, J., Scholey, C., Sorri, J., Uusitalo, J., Lion, Michel, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2012

16. First observation of excited states of Hg-173

Author

O'Donnell, D., D. Page, R., Scholey, C., Bianco, L., Capponi, L., J. Carroll, R., G. Darby, I., Donosa, L., Drummond, M., Ertugral, F., Grahn, T., T.Greenlees, P., Hauschild, K., Herzan, A., Jakobsson, U., Jones, P., T. Joss, D., Julin, R., Juutinen, S., Ketelhut, S., Labiche, M., Leino, M., Lopez-Martens, A., Mulholland, K., Nieminen, P., Peura, P., Rahkila, P., Rinta-Antila, S., Ruotsalainen, P., Sandzelius, M., Saren, J., Saygi, B., Simpson, J., Sorri, J., Thornthwaite, A., Uusitalo, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
NUCLEAR-DATA SHEETS, SHAPE COEXISTENCE, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, TOTAL DATA READOUT, ISOTOPES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The neutron-deficient nucleus Hg-173 has been studied following fusion-evaporation reactions. The observation of the decay of excited states via gamma radiation are reported for the first time and a tentative level scheme is proposed. The proposed level scheme is discussed within the context of the systematics of neighboring neutron-deficient Hg nuclei. In addition to the gamma-ray spectroscopy, the alpha decay of this nucleus has been measured yielding superior precision to earlier measurements.

Published
2012
Full Text
View/download PDF

17. Characterizing the atomic mass surface beyond the proton drip line via alpha-decay measurements of the pi s(1/2) ground state of Re-165 and the pi h(11/2) isomer in Ta-161

Author

Thornthwaite, A., O'Donnell, D., D. Page, R., Joss, D.T., Scholey, C., Bianco, L., Capponi, L., J. Carroll, R., G. Darby, I., Donosa, L., C. Drummond, M., Ertugral, F., Grahn, T., T. Greenlees, P., Hauschild, K., Herzan, A., Jakobsson, U., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Labiche, M., Leino, M., Lopez-Martens, A., Mullholland, K., Nieminen, P., Peura, P., Rahkila, P., Rinta-Antila, S., Ruotsalainen, P., Sandzelius, M., Saren, J., Saygi, B., Simpson, J., Sorri, J., Uusitalo, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
NUCLEAR-DATA SHEETS, TOTAL DATA READOUT, NEUTRON-DEFICIENT ISOTOPES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

The alpha-decay chains originating from the pi s(1/2) and pi h(11/2) states in Au-173 have been investigated following fusion-evaporation reactions. Four generations of alpha radioactivities have been correlated with Au-173(m) leading to a measurement of the alpha decay of Ta-161(m). It has been found that the known alpha decay of Ta-161, which was previously associated with the decay of the ground state, is in fact the decay of an isomeric state. This work also reports on the first observation of prompt gamma rays feeding the ground state of Au-173. This prompt gamma radiation was used to aid the study of the alpha-decay chain originating from the pi s(1/2) state in Au-173. Three generations of alpha decays have been correlated with this state, leading to the observation of a previously unreported activity which is assigned as the decay of Re-165(g). This work also reports the excitation energy of an alpha-decaying isomer in Ta-161 and the Q(alpha) value of the decay of Ta-161(g). DOI:10.1103/PhysRevC.86.064315

Published
2012
Full Text
View/download PDF

18. Combined in-beam electron and gamma-ray spectroscopy of Hg-184,Hg-186

Author

Scheck, M., A. Butler, P., P. Gaffney, L., Bree, N., J. Carrol, R., Cox, D., Grahn, T., T. Greenlees, P., Hauschild, K., Herzan, A., Huyse, M., Jakobsson, U., Jones, P., T. Joss, D., Julin, R., Juutinen, S., Ketelhut, S., Herzberg, R.-D., Kowalczyk, M., C. Larsen, A., Leino, M., Lopez-Martens, A., Nieminen, P., D. Page, R., Pakarinen, J., Papadakis, P., Peura, P., Rahkila, P., Rinta-Antila, S., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Srebrny, J., Van Duppen, P., V. Watkins, H., Uusitalo, J., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
COEXISTENCE, NUCLEI, ISOTOPES, MERCURY, HG-184, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], HG, PB, TRANSITION, INTRUDER STATES, PB-186
Abstract

By exploiting the SAGE spectrometer a simultaneous measurement of conversion electrons and gamma rays emitted in the de-excitation of excited levels in the neutron-deficient nuclei Hg-184,Hg-186 was performed. The light Hg isotopes under investigation were produced using the 4n channels of the fusion-evaporation reactions of Ar-40 and Sm-148,Sm-150. The measured K- and L-conversion electron ratios confirmed the stretched E2 nature of several transitions of the yrast bands in Hg-184,Hg-186. Additional information on the E0 component of the 2(2)(+) -> 2(1)(+) transition in Hg-186 was obtained.

Published
2011
Full Text
View/download PDF

19. K-Isomer in 252No

Author

Sulignano, B., Theisen, Ch., Ljungvall, J., Ackermann, D., Antalic, S., Dorvaux, O., Drouart, A., Görgen, A., T. Greenlees, P., Hauschild, K., D. Herzberg, R., P. Heβberger, F., Hofmann, S., Jakobsson, U., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Korten, W., Leino, M., Nyman, M., Obertelli, A., Pakarinen, J., Parr, E., Papadakis, P., Peura, P., Piot, J., Rahkila, P., Rostron, D., Ruotsalainen, P., Saren, J., Scholey, C., Sorri, J., Uusitalo, J., Venhart, M., Zielińska, M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009
Full Text
View/download PDF

20. $\alpha$ decay of $^{159}$Re and proton emission from $^{155}$Ta

Author

Page, R.D., Bianco, L., Darby, I.G., Uusitalo, J., Joss, D.T., Grahn, T., Herzberg, R.D., Pakarinen, J., Thomson, J., Eeckhaudt, S., Greenlees, P.T., Jones, P.M., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Leppanen, A.P., Nyman, M., Rahkila, P., Saren, J., Scholey, C., Steer, A., Hornillos, M.B.G., Al-Khalili, J.S., Cannon, A.J., Stevenson, P.D., Erturk, S., Gall, B., Hadinia, B., Venhart, M., Simpson, J., Département Recherches Subatomiques (DRS-IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
NUCLEI, RADIOACTIVITY, N = 82, NEUTRON-DEFICIENT ISOTOPES, HF-154, DRIP-LINE, 23.50.+z, 23.60.+e, 27.70.+q, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, LIMIT, LU-153
Abstract

The alpha decay of Re-159 has been observed for the first time in reactions of 300 MeV Ni-58 ions with an isotopically enriched Cd-106 target. The Re-159 ions were separated in-flight using the RITU separator and implanted into the GREAT spectrometer. The alpha decay emanates from the proton-emitting pi h(11/2) state in Re-159 with an energy of E-alpha=6776 +/- 26 keV and a branching ratio of 7.5 +/- 3.5%. This alpha decay populates a state in the closed neutron shell nucleus Ta-155, which decays by emitting 1444 +/- 15 keV protons with a half-life of 2.9(-1.1)(+1.5) ms. These values are consistent with the emission of the proton from a pi h(11/2) orbital. These results fit in with the systematics of proton and alpha-particle separation energies in the region, but disagree with the previously reported decay properties of Ta-155

Published
2007
Full Text
View/download PDF

21. Experimental investigation of the 0(2)(+) band in Sm-154 as a beta-vibrational band

Author

Smallcombe, J., Davies, P. J., Barton, C. J., Jenkins, D. G., Andersson, L. L., Butler, P. A., Cox, D. M., Herzberg, R. D., Mistry, A., Parr, E., Grahn, T., Greenlees, P. T., Hauschild, K., Herzan, A., Jakobsson, U., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Lopez-Martens, A., Nieminen, P., Pakarinen, J., Papadakis, P., Peura, P., Rahkila, P., Rinta-Antila, S., Ruotsalainen, P., Sandzelius, M., Saren, J., Catherine Scholey, Sorri, J., Uusitalo, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM)

Subjects
Internal conversion electrons, EXCITATIONS, NUCLEI, Gamma ray, Electric monopole, Rare-earth, 0(+) STATES, GAMMA, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Collective models, ELECTRIC MONOPOLE TRANSITIONS, Spectroscopy
Abstract

A study of Sm-154 through gamma-ray and internal conversion electron coincidence measurements was performed using the Silicon And GErmanium spectrometer (SAGE). An upper limit for the rho(2)(E0; 2(2)(+) -> 2(1)(+)) and measurement of the rho(2) (E0; 4(2)(+) -> 4(1)(+)) monopole transitions strengths were determined. The extracted transition strength for each is significantly lower than that predicted by either the Bohr and Mottelson beta-vibration description or the interacting boson model. Hence, the long standing interpretation of these states as a collective band built on the 0(2)(+) state, which is conventionally assigned as a Bohr and Mottelson beta vibration is questionable. (C) 2014 The Authors. Published by Elsevier B.V.

Full Text
View/download PDF

22. Towards saturation of the electron-capture delayed fission probability: The new isotopes $^{240}Es$ and $^{236}Bk$

Author

Rauno Julin, J. Khuyagbaatar, Bettina Lommel, Juha Sorri, Kalle Auranen, R. Briselet, Philippos Papadakis, R-D Herzberg, Paul Greenlees, K. Hauschild, Pauli Peura, J. Krier, Katsuhisa Nishio, Panu Rahkila, S. Juutinen, Sanna Stolze, Joonas Konki, B. Sulignano, Michael Block, Egon Jäger, Ch. Theisen, Mahananda Dasgupta, Alexander Yakushev, Tuomas Grahn, M. J. Mallaburn, Jari Partanen, K. Rezynkina, Janne Pakarinen, A. Ward, Andrej Herzan, Duc Huy Luong, Mikael Sandzelius, David Hinde, V. Yakusheva, Panu Ruotsalainen, Juha Uusitalo, Daniel Cox, A. Di Nitto, Jan Sarén, H. Badran, Ch. E. Düllmann, Birgit Kindler, F. P. Heßberger, A. Lopez-Martens, Matti Leino, C. Scholey, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Konki, J., Khuyagbaatar, J., Uusitalo, J., Greenlees, P. T., Auranen, K., Badran, H., Block, M., Briselet, R., Cox, D. M., Dasgupta, M., Di Nitto, A., Dullmann, C. E., Grahn, T., Hauschild, K., Herzan, A., Herzberg, R. -D., Hessberger, F. P., Hinde, D. J., Julin, R., Juutinen, S., Jager, E., Kindler, B., Krier, J., Leino, M., Lommel, B., Lopez-Martens, A., Luong, D. H., Mallaburn, M., Nishio, K., Pakarinen, J., Papadakis, P., Partanen, J., Peura, P., Rahkila, P., Rezynkina, K., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Stolze, S., Sulignano, B., Theisen, C., Ward, A., Yakushev, A., and Yakusheva, V.

Subjects
Electron-capture delayed fission, Nuclear and High Energy Physics, Electron capture, Fission, Fusion–evaporation reaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 236 Bk, 01 natural sciences, 7. Clean energy, Recoil separator, Nuclear physics, fusion-evaporation reactions, 236Bk, 240Es, 240 Es, 0103 physical sciences, ddc:530, 010306 general physics, α decay, isotopes, Physics, Isotope, ta114, Isotopes with mass 236–240, 010308 nuclear & particles physics, lcsh:QC1-999, Exponential function, Bk, mass, Atomic physics, Saturation (chemistry), Fusion–evaporation reactions, α particles, lcsh:Physics, Radioactive decay
Abstract

The new neutron-deficient nuclei 240 Es and 236 Bk were synthesised at the gas-filled recoil separator RITU. They were identified by their radioactive decay chains starting from 240 Es produced in the fusion–evaporation reaction 209 Bi( 34 S,3n) 240 Es. Half-lives of 6 ( 2 ) s and 22 − 6 + 13 s were obtained for 240 Es and 236 Bk, respectively. Two groups of α particles with energies E α = 8.19 ( 3 ) MeV and 8.09 ( 3 ) MeV were unambiguously assigned to 240 Es. Electron-capture delayed fission branches with probabilities of 0.16 ( 6 ) and 0.04 ( 2 ) were measured for 240 Es and 236 Bk, respectively. These new data show a continuation of the exponential increase of ECDF probabilities in more neutron-deficient isotopes.

Published
2017
Full Text
View/download PDF

23. Probing single-particle structures beyond the proton drip line

Author

R. D. Page, L. Bianco, I. G. Darby, D. T. Joss, T. Grahn, R.-D. Herzberg, J. Pakarinen, J. Thomson, J. Uusitalo, S. Eeckhaudt, P. T. Greenlees, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, A.-P. Leppänen, M. Nyman, P. Rahkila, J. Sarén, C. Scholey, A. Steer, M. Venhart, J. Simpson, J. S. Al-Khalili, A. J. Cannon, P. D. Stevenson, S. Ertürk, B. Gall, B. Hadinia, Lídia S. Ferreira, Paramasivan Arumugan, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Lídia S. Ferreira, Paramasivan Arumugan, Ferreira, LS, Arumugam, P, Scholey, Catherine -- 0000-0002-8743-6071, Stevenson, Paul -- 0000-0003-2645-2569, Pakarinen, Janne -- 0000-0001-8944-8757, Grahn, Tuomas -- 0000-0002-6255-2279, Jones, Pete -- 0000-0001-7480-6603, and [Page, R. D. -- Bianco, L. -- Darby, I. G. -- Joss, D. T. -- Grahn, T. -- Herzberg, R. -D. -- Pakarinen, J. -- Thomson, J.] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England -- [Uusitalo, J. -- Eeckhaud, S. -- Greenlees, P. T. -- Jones, P. M. -- Julin, R. -- Juutinen, S. -- Ketelhut, S. -- Leino, M. -- Leppanen, A. -P. -- Nyman, M. -- Rahkila, P. -- Saren, J. -- Scholey, C. -- Steer, A. -- Venhart, M.] Univ jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland -- [Simpson, J.] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Al-Khalili, J. S. -- Cannon, A. J. -- Stevenson, P. D.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England -- [Erturk, S.] Nigde Univ, Nigde, Turkey -- [Gall, B.] ULP Strasbourg, CNRS IN2P, IPHC, F-67037 Strasbourg 2, France -- [Hadinia, B.] AlbaNova Univ Ctr, Royal Inst Technol, S-10691 Stockholm, Sweden

Subjects
Proton, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, nuclei with mass number 150 to 189, Neutron, alpha-decay, radioactive decay periods, Proton emission, branching ratio. Re-159, 010306 general physics, Nuclear Experiment, Physics, RADIOACTIVITY Re-159(alpha)[from Cd-106(Ni-58,p4n)], Ta-155 deduced levels, Ta-155(p)[from Re-159 a decay], 010308 nuclear & particles physics, Alpha particle, previous Ta-155 study, Charged particle, comparisons with neighbouring nuclides, measured E-alpha, E-p, T-1/2, 23.50.+z, 23.60.+e, 27.70.+q, J, pi configurations, Alpha decay, Atomic physics, Nucleon, Radioactive decay, proton emission decay
Abstract

International Conference on Proton Emitting Nuclei and Related Topics -- JUN 17-23, 2007 -- Lisbon, PORTUGAL, WOS: 000252267300021, Single-particle energies have been investigated in the closed neutron shell proton emitter Ta-155. The Ta-155 nuclei were populated through the alpha decay of Re-159, which has been observed for the first time. The (159)Rc nuclei were produced in reactions of 300 MeV Ni-58 ions with an isotopically enriched Cd-106 target, separated in-flight using the RITU separator and implanted into the GREAT spectrometer. The Re-159 a decay emanates from the proton-emitting pi h(11/2) state and populates a state in Ta-155 which decays by the emission of a proton from a pi h(11/2) orbital. The results fit in with the systematics of proton and alpha-particle separation energies in the region, but disagree with the previously reported decay properties of Ta-155., Fundacao Ciencia & Tecnol, Minist Ciencia & Tecnol, Fundacao Calouste Gulbenklan, Fundacao Luso Americana, UK Engineering and Physical Sciences Research Council; Swedish Natural Science Research Council; Academy of Finland under the Firmish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL); European Union Sixth Framework contract EURONS [RII3-CT-2004-506065]; European Union Marie Curie Programme [HPMT-CT-2001-00250], The authors would like to thank the technical staff at the Accelerator Laboratory at the University of Jyvaskyla for their excellent support and to Paul Morrall from Daresbury Laboratory for making the targets. This work has been supported by the UK Engineering and Physical Sciences Research Council; the Swedish Natural Science Research Council; the Academy of Finland under the Firmish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL); the European Union Sixth Framework contract EURONS (contract RII3-CT-2004-506065) and the European Union Marie Curie Programme (contract HPMT-CT-2001-00250).

Published
2007
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results