Journal articles
New Type of Asymmetric Fission in Proton-Rich Nuclei
A. N. Andreyev
J. Elseviers
M. Huyse
P. van Duppen
S. Antalic
A. Barzakh
N. Bree
T. E. Cocolios
V. F. Comas
J. Diriken
D. Fedorov
V. Fedosseev
S. Franchoo
1
J. A. Heredia
O. Ivanov
U. Köster
2
B. A. Marsh
K. Nishio
R. D. Page
N. Patronis
M. Seliverstov
I. Tsekhanovich
3
P. van den Bergh
J. van de Walle
M. Venhart
S. Vermote
M. Veselsky
C. Wagemans
T. Ichikawa
A. Iwamoto
P. Möller
A. J. Sierk
1
IPNO - Institut de Physique Nucléaire d'Orsay (IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX - France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR8608 (France)
2
ILL - Institut Laue-Langevin (6, rue Jules Horowitz BP 156 38042 Grenoble Cedex 9 - France)
- ILL (France)
3
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)
Abstract : A very exotic process of β-delayed fission of 180Tl is studied in detail by using resonant laser ionization with subsequent mass separation at ISOLDE (CERN). In contrast to common expectations, the fission-fragment mass distribution of the post-β-decay daughter nucleus 180Hg (N/Z=1.25) is asymmetric. This asymmetry is more surprising since a mass-symmetric split of this extremely neutron-deficient nucleus would lead to two 90Zr fragments, with magic N=50 and semimagic Z=40. This is a new type of asymmetric fission, not caused by large shell effects related to fragment magic proton and neutron numbers, as observed in the actinide region. The newly measured branching ratio for β-delayed fission of 180Tl is 3.6(7)×10-3%, approximately 2 orders of magnitude larger than in an earlier study.
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http://hal.in2p3.fr/in2p3-00575165
Contributor : Sophie Heurteau <>
Submitted on : Wednesday, March 9, 2011 - 5:08:51 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM
Contributor : Sophie Heurteau <>
Submitted on : Wednesday, March 9, 2011 - 5:08:51 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM
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- HAL Id : in2p3-00575165, version 1
- DOI : 10.1103/PhysRevLett.105.252502
Citation
A. N. Andreyev, J. Elseviers, M. Huyse, P. van Duppen, S. Antalic, et al.. New Type of Asymmetric Fission in Proton-Rich Nuclei. Physical Review Letters, American Physical Society, 2010, 105, pp.252502. ⟨10.1103/PhysRevLett.105.252502⟩. ⟨in2p3-00575165⟩
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