Journal articles
New isomer in $^{96}$Y marking the onset of deformation at N = 57
W. Iskra
B. Fornal
S. Leoni
G. Bocchi
A. Petrovici
C. Porzio
A. Blanc
1
G. de France
2
M. Jentschel
1
U. Köster
1
P. Mutti
1
J.-M. Régis
G. Simpson
3
T. Soldner
1
A. Ur
W. Urban
D. Bazzacco
G. Benzoni
S. Bottoni
A. Bruce
N. Cieplicka-Oryńczak
C. Crespi
L. M. Fraile
W. Korten
4
T. Kröll
S. Lalkovski
N. Márginean
C. Michelagnoli
2
B. Melon
D. Mengoni
B. Million
A. Nannini
D. Napoli
Zs. Podolyák
P. H. Regan
B. Szpak
1
ILL - Institut Laue-Langevin (6, rue Jules Horowitz BP 156 38042 Grenoble Cedex 9 - France)
- ILL (France)
2
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)
3
LPSC - Laboratoire de Physique Subatomique et de Cosmologie (53 avenue des Martyrs - 38026 Grenoble Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology (46 avenue Félix Viallet 38031 Grenoble Cedex 1 - France)
- UGA [2016-2019] - Université Grenoble Alpes [2016-2019] (CS 40700 - 38058 Grenoble cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5821 (France)
4
IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (CEA Saclay
F-91191 Gif sur Yvette cedex - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
Abstract : The level scheme of 96Y was significantly extended and a new 201 ns isomer was located at 1655 keV excitation energy, with spin-parity assignment of 5± or 6−. The isomer decays to spherical low-spin structure by transitions with large hindrance and is fed by a short cascade which resembles the beginning of a rotational band. This is in analogy with the feeding and decay pattern of the 4− isomer in 98Y, here confirmed, by lifetime analysis, as a bandhead of a rotational structure with sizable deformation. It is suggested that the new isomer in 96Y arises from a shape change between deformed and spherical configurations, which indicates the appearance of deformation already at N = 57 in the yttrium chain. The experimental findings for 96Y are strengthened by theoretical calculations based on the complex Excited Vampir model.
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Contributor : Emmanuelle Vernay <>
Submitted on : Wednesday, January 24, 2018 - 1:47:23 PM
Last modification on : Friday, February 12, 2021 - 10:58:07 AM
Long-term archiving on: : Thursday, May 24, 2018 - 4:47:06 PM
Contributor : Emmanuelle Vernay <>
Submitted on : Wednesday, January 24, 2018 - 1:47:23 PM
Last modification on : Friday, February 12, 2021 - 10:58:07 AM
Long-term archiving on: : Thursday, May 24, 2018 - 4:47:06 PM
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- HAL Id : in2p3-01481899, version 1
- DOI : 10.1209/0295-5075/117/12001
Citation
W. Iskra, B. Fornal, S. Leoni, G. Bocchi, A. Petrovici, et al.. New isomer in $^{96}$Y marking the onset of deformation at N = 57. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2017, 117 (1), pp.12001. ⟨10.1209/0295-5075/117/12001⟩. ⟨in2p3-01481899⟩
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