Eur. Phys. J. Special Topics 150, 187-188 (2007)
https://doi.org/10.1140/epjst/e2007-00300-y

Structure of unstable nuclei in the sd-pf shell region by shell model with proper tensor force

¹ Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
² Department of Physics, University of Tokyo, Hongo, Tokyo, 113-0033, Japan
³ Center for Nuclear Study, University of Tokyo, Hongo, Tokyo, 113-0033, Japan
⁴ RIKEN, Hirosawa, Wako-shi, Saitama, 351-0198, Japan
⁵ Institute of Natural Sciences, Senshu University, Kanda, Chiyoda, Tokyo, 101-8425, Japan
⁶ Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi Aizu-Wakamatsu, Fukushima, 965-8580, Japan

Received: 31 January 2007
Published online: 8 December 2007

Abstract

Focusing on the importance of the tensor force in the effective interaction, we investigate the structure of unstable nuclei around N=28 with large-scale shell-model calculations. From the analysis of the spin-tensor decomposition for some interactions, the tensor force in the effective interaction should be close to the π+ ρ force, whereas it is much weaker in the Millener-Kurath (MK) interaction which is often used as the cross-shell interaction. The significance of the tensor force appears in the structure around ⁴²Si: the proper tensor force predicts that it is deformed contrary to the result from MK.