2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 7, 347-353

Evidence for deformation in 113-116Cd isotopes

N. Buforn1 - A. Astier1 - J. Meyer1 - M. Meyer1 - S. Perriès1 - N. Redon1 - O. Stézowski1 - M.G. Porquet2 - I. Deloncle2 - A. Bauchet2 - J. Duprat3 - B.J.P. Gall4 - C. Gautherin5 - E. Gueorguieva6 - F. Hoellinger4 - T. Kutsarova7 - R. Lucas5 - A. Minkova6 - N. Schulz4 - H. Sergolle3 - Ts. Venkova7 - A.N. Wilson2

1 IPN Lyon, IN2P3/CNRS, Univ. Lyon-1, 69622 Villeurbanne Cedex, France
2 CSNSM Orsay, IN2P3/CNRS, Univ. Paris-Sud, 91405 Orsay Campus, France
3 IPN Orsay, IN2P3/CNRS, Univ. Paris-Sud, 91406 Orsay, France
4 IReS Strasbourg, IN2P3/CNRS, Univ. Louis Pasteur, 67037 Strasbourg, France
5 CEA/Saclay, DAPNIA/SPhN, 91191 Gif-sur-Yvette, France
6 University of Sofia, Faculty of Physics, 1126 Sofia, Bulgaria
7 INRNE, BAN, 1784 Sofia, Bulgaria

Received: 21 December 1999 / Revised version: 16 February 2000 Communicated by B. Herskind

Abstract
High-spin states in 113-116Cd have been investigated with the fusion-fission reaction 28Si + 176Yb at 145$\>$MeV. The experiment has been performed with the Eurogam2 array. New rotational bands based on two quasi-particle states have been observed for even-even cadmium isotopes. A new level scheme based on the 11/2- isomeric state is proposed for 115Cd and the one of 113Cd has been extended to spin (31/2-). The decoupled bands identified in both odd-A nuclei are interpreted as being built upon a low-$\Omega$ h11/2 quasi-neutron configuration. Microscopic Hartree-Fock + BCS calculations confirm the prolate deformation in this mass region especially for the odd cadmium isotopes.

PACS
21.60.Ev Collective models - 21.60.Jz Hartree-Fock - 23.20.Lv Gamma transitions and level energies - 25.70.Jj Fusion and fusion-fission reactions - 27.60.+j $90 \leq A \leq 149$


Copyright Società Italiana di Fisica, Springer-Verlag 2000