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.

引用

页数：4

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