Journal articles
Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes
N. Kesteloot
B. Bastin
1
L. P. Gaffney
K. Wrzosek-Lipska
K. Auranen
C. Bauer
M. Bender
2
V. Bildstein
A. Blazhev
S. Bönig
N. Bree
E. Clément
1
T. E. Cocolios
A. Damyanova
I. Darby
H. de Witte
D. Di Julio
J. Diriken
C. Fransen
J. E. García-Ramos
R. Gernhäuser
T. Grahn
P.-H. Heenen
H. Hess
K. Heyde
M. Huyse
J. Iwanicki
U. Jakobsson
J. Konki
T. Kröll
B. Laurent
3
N. Lecesne
1
R. Lutter
J. Pakarinen
P. Peura
E. Piselli
L. Próchniak
P. Rahkila
E. Rapisarda
P. Reiter
M. Scheck
M. Seidlitz
M. Sferrazza
B. Siebeck
M. Sjodin
1
H. Tornqvist
E. Traykov
1
J. van de Walle
P. van Duppen
M. Vermeulen
D. Voulot
N. Warr
F. Wenander
K. Wimmer
M. Zielińska
3
N. Kesteloot
Author
B. Bastin 1
Author IdHAL : beyhan-bastin ORCID : https://orcid.org/0000-0001-5959-0875
L. P. Gaffney
Author
K. Wrzosek-Lipska
Author
1
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)
2
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan (Chemin du Solarium - BP 120 - 33175 Gradignan Cedex - France)
- Université Sciences et Technologies - Bordeaux 1 (351 cours de la Libération - 33405 Talence cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5797 (France)
3
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 : Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient $^{196,198,200,202}$Po
isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes,
is extracted. In the two heaviest isotopes, $^{200,202}$Po, the transitional and diagonal matrix elements of the $2^+
_1$ state are determined. In $^{196,198}$Po multistep Coulomb excitation is observed, populating the $4^+_1$ , $0^+
_2$ , and $2^+_2$ states.
The experimental results are compared to the results from the measurement of mean-square charge radii in
polonium isotopes, confirming the onset of deformation from $^{196}$Po onwards. Three model descriptions are used
to compare to the data. Calculations with the beyond-mean-field model, the interacting boson model, and the
general Bohr Hamiltonian model show partial agreement with the experimental data. Finally, calculations with
a phenomenological two-level mixing model hint at the mixing of a spherical structure with a weakly deformed
rotational structure.
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Journal articles
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http://hal.in2p3.fr/in2p3-01225279
Contributor : Michel Lion <>
Submitted on : Thursday, November 5, 2015 - 11:03:28 PM
Last modification on : Thursday, December 3, 2020 - 9:40:03 PM
Contributor : Michel Lion <>
Submitted on : Thursday, November 5, 2015 - 11:03:28 PM
Last modification on : Thursday, December 3, 2020 - 9:40:03 PM
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- HAL Id : in2p3-01225279, version 1
- DOI : 10.1103/PhysRevC.92.054301
Citation
N. Kesteloot, B. Bastin, L. P. Gaffney, K. Wrzosek-Lipska, K. Auranen, et al.. Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes. Physical Review C, American Physical Society, 2015, 92 (5), pp.054301. ⟨10.1103/PhysRevC.92.054301⟩. ⟨in2p3-01225279⟩
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