Eur. Phys. J. A (2005) 25: 573-574
https://doi.org/10.1140/epjad/i2005-06-095-y

ENAM 2004

Pairing effects on the collectivity of quadrupole states around ³²Mg

¹ Heavy Ion Nuclear Physics Laboratory, RIKEN, Hirosawa 2-1, 351-0198, Wako, Saitama, Japan
² Institut de Physique Nucléaire, IN2P3-CNRS, 91406, Orsay Cedex, France

^* e-mail: yamagami@riken.jp

Received: 10 December 2004
Accepted: 18 February 2005
Published online: 11 May 2005

Abstract

The anomalous E2 properties of the first 2⁺ states in neutron-rich nuclei ³²Mg and ³⁰Ne are studied by the Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) calculations. The large B(E2) values and the low excitation energies of the first 2⁺ states are well described by the HFB plus QRPA calculations with spherical symmetry. We conclude that pairing effects account largely for the anomalously large quadrupole collectivity.