Electric quadrupole moments of the 2+ 1 states in 100,102,104Cd

Using the REX-ISOLDE facility at CERN the Coulomb excitation cross sections for the 0+
gs→2+
1 transition in the 𝛽-unstable isotopes
100,102,104
Cd
have been measured for the first time. Two different targets were used, which allows for the first extraction of the static electric quadrupole moments 𝑄⁡(2+
1) in
102,104
Cd
. In addition to the 𝐵⁡(𝐸⁢2) values in
102,104
Cd
, a first experimental limit for the 𝐵⁡(𝐸⁢2) value in
100
Cd
is presented. The data was analyzed using the maximum likelihood method. The provided probability distributions impose a test for theoretical predictions of the static and dynamic moments. The data are interpreted within the shell-model using realistic matrix elements obtained from a 𝐺-matrix renormalized CD-Bonn interaction. In view of recent results for the light Sn isotopes the data are discussed in the context of a renormalization of the neutron effective charge. This study is the first to use the reorientation effect for post-accelerated short-lived radioactive isotopes to simultaneously determine the 𝐵⁡(𝐸⁢2) and the 𝑄⁡(2+
1) values.

Authors: A. Ekström, J. Cederkäll1, D. D. Di Julio, C. Fahlander, M. Hjorth-Jensen, A. Blazhev, B. Bruyneel, P. A. Butler, T. Davinson, J. Eberth, C. Fransen, K. Geibel, H. Hess, O. Ivanov, J. Iwanicki, O. Kester, J. Kownacki, U. Köster, B. A. Marsh, P. Reiter, M. Scheck, B. Siebeck, S. Siem, I. Stefanescu, H. K. Toft, G. M. Tveten, J. Van de Walle, D. Voulot, N. Warr, D. Weißhaar, F. Wenander, K. Wrzosek, and M. Zielińska

Doi: 10.1103/PhysRevC.80.054302

Issue number:

Journal: Phys. Rev. C

Page number: 054302

Published on: 2009-11-03

Year: