Quadrupole collectivity in neutron-rich Cd isotopes

S. Boenig, Th Kroell, S. Ilieva, M. Scheck

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.
Original languageEnglish
Title of host publication11TH INTERNATIONAL SPRING SEMINAR ON NUCLEAR PHYSICS: SHELL MODEL AND NUCLEAR STRUCTURE - ACHIEVEMENTS OF THE PAST TWO DECADES
EditorsA Gargano, L Coraggio, N Itaco
PublisherIOP Publishing
Volume580
DOIs
Publication statusPublished - 2015

Publication series

NameJournal of Physics Conference Series
PublisherIOP Publishing
ISSN (Print)1742-6588

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