Shape change of Ce-129 at high spin states

Citation
Gs. Li et al., Shape change of Ce-129 at high spin states, HIGH EN P N, 25(10), 2001, pp. 984-988
Citations number
10
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN journal
02543052 → ACNP
Volume
25
Issue
10
Year of publication
2001
Pages
984 - 988
Database
ISI
SICI code
0254-3052(200110)25:10<984:SCOCAH>2.0.ZU;2-0
Abstract
High spin states of Ce-129 were populated through the reaction Sn-116(O-16, 3n)Ce-129 at a beam energy of 73 MeV. Lifetimes of the excited states were measured using the Doppler shift attenuation method. The transition quadru pole moments Q, were deduced from lifetime data. The results indicate that Collectivity Of Ce-129 is reduced with respect to the even-even core Ce-128 . This reduction in collectivity caused by the addition of a h(11/2) neutro n can be interpreted as due to triaxial deformation induced by shape drivin g effect. Although the Q, values of the negative-parity band are somewhat s maller than the ones of the positive-parity band, they exhibit a considerab ly similar behavior with increasing angular momentum. It would appear that the two h(11/2) quasiprotons possibly have a dominant influence on property of the core.