Quadrupole collectivity in neutron-rich Cd isotopes

被引：0
|
作者：
Boenig, S. [1 ]
Kroell, Th [1 ]
Ilieva, S. [1 ]
Scheck, M. [1 ,2 ,3 ]
机构：
[1] Tech Univ Darmstadt, Inst Kernphys, Darmstadt, Germany
[2] Univ West Scotland, Sch Engn, Paisley, Renfrew, Scotland
[3] Scottish Univ Phys Alliance, Glasgow, Lanark, Scotland
来源：
11TH INTERNATIONAL SPRING SEMINAR ON NUCLEAR PHYSICS: SHELL MODEL AND NUCLEAR STRUCTURE - ACHIEVEMENTS OF THE PAST TWO DECADES | 2015年 / 580卷
关键词：
STATES;
D O I：
10.1088/1742-6596/580/1/012023
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The proximity to the closed shells at Z = 50 and N = 82 makes the neutron-rich Cd isotopes a perfect test case for nuclear theories. The energy of the first excited 2(+)-state in the even Cd122-128 shows an irregular behaviour as the Cd isotopes exhibit only a slight increase for Cd-122 to Cd-126 and even a decrease from Cd-126 to Cd-128. This anomaly can so far not be reproduced by shell model calculations. Only beyond mean field calculations with a resultant prolate deformation are capable to describe this anomalous behaviour. In order to gain more information about the neutron-rich Cd isotopes a Coulomb excitation experiment was performed with MINIBALL at REX-ISOLDE, CERN. The extracted transition strengths B(E2, 0(gs)(+) -> 2(1)(+)) for Cd-122,Cd-124,Cd-126,Cd-128 agree with beyond mean field calculations. The spectroscopic quadrupole moments Q(s) (2(1)(+)) are compared with measurements on odd neutron-rich Cd isotopes.
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页数：4
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