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Conference papers
Medium-spin states of the neutron-rich $^{87,89}$Br isotopes: configurations and shapes
B.M. Nyako
J. Timar
M. Csatlos
Zs. Dombradi
A. Krasznahorkay
I. Kuti
D. Sohler
T.G. Tornyi
M. Czerwinski
T. Rzaca-Urban
W. Urban
P. Baczyk
L. Atanasova
D.L. Balabanski
K. Sieja
1
A. Blanc
2
M. Jentschel
2
U. Köster
2
P. Mutti
2
T. Soldner
2
G. de France
3
G.S. Simpson
4
C.A. Ur
1
IPHC - Institut Pluridisciplinaire Hubert Curien (23 rue Loess - BP 28 67037 Strasbourg Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7178 (France)
2
ILL - Institut Laue-Langevin (6, rue Jules Horowitz BP 156 38042 Grenoble Cedex 9 - France)
- ILL (France)
3
GANIL - Grand Accélérateur National d'Ions Lourds (Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5 - France)
- CNRS - Centre National de la Recherche Scientifique : UPR3266 (France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/GANIL (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
4
LPSC - Laboratoire de Physique Subatomique et de Cosmologie (53 avenue des Martyrs - 38026 Grenoble Cedex - France)
- Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology (46 avenue Félix Viallet 38031 Grenoble Cedex 1 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5821 (France)
- UGA [2016-2019] - Université Grenoble Alpes [2016-2019] (38058 Grenoble cedex - France)
Abstract : Medium-spin excited states of the neutron-rich 87Br and 89Br nuclei were observed and studied for the first time. They were populated in fission of 235U induced by the cold-neutron beam of the PF1B facility of the Institut Laue-Langevin, Grenoble. The measurement of γ radiation following fission has been performed using the EXILL array of Ge detectors. The observed level schemes were compared with results of large valence space shell model calculations. Both medium-spin level schemes consist of band-like structures, which can be understood as bands built on the πf 5/2, πp 3/2 and πg 9/2 configurations. Both nuclei have 5/2− ground state spin-parity contrary to the odd-mass Br isotopes containing fewer neutrons, which have 3/2− ground state spin-parity. On the basis of the properties of the πg 9/2 decoupled bands the deformations of the 87Br and 89Br fit to the systematics of nuclei in the region. 87Br is close to the vibrational limit, while 89Br is more rotational.
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http://hal.in2p3.fr/in2p3-01344537
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, July 12, 2016 - 10:28:21 AM
Last modification on : Tuesday, May 11, 2021 - 11:36:49 AM
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, July 12, 2016 - 10:28:21 AM
Last modification on : Tuesday, May 11, 2021 - 11:36:49 AM
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- HAL Id : in2p3-01344537, version 1
- DOI : 10.1088/1742-6596/724/1/012051
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B.M. Nyako, J. Timar, M. Csatlos, Zs. Dombradi, A. Krasznahorkay, et al.. Medium-spin states of the neutron-rich $^{87,89}$Br isotopes: configurations and shapes. XXI International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei, Sep 2015, Varna, Bulgaria. pp.012051, ⟨10.1088/1742-6596/724/1/012051⟩. ⟨in2p3-01344537⟩
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