Eur. Phys. J. A (2005) 25: 499-502
https://doi.org/10.1140/epjad/i2005-06-032-2

ENAM 2004

Shell-model description of neutron-rich pf-shell nuclei with a new effective interaction GXPF 1

¹ Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, 965-8580, Fukushima, Japan
² Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, 113-0033, Tokyo, Japan
³ RIKEN, Hirosawa, Wako-shi, 351-0198, Saitama, Japan
⁴ National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, 48824-1321, East Lansing, MI, USA
⁵ Institute of Natural Sciences, Senshu University, Higashimita, Tama, Kawasaki, 214-8580, Kanagawa, Japan

^* e-mail: m-honma@u-aizu.ac.jp

Received: 1 October 2004
Accepted: 18 February 2005
Published online: 22 April 2005

Abstract

The shell-model effective interaction GXPF1 is tested for the description of unstable pf-shell nuclei. The GXPF1 successfully describes the N = 32 shell gap in Ca, Ti and Cr isotopes, while the deviation of predicted E _x(2⁺ ₁) in ⁵⁶Ti from the recent experimental data requires the modification of the Hamiltonian especially in the T = 1 matrix elements related to the p _1/2 and f _5/2 orbits. The modified interaction gives improved description simultaneously for all these isotope chains.