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Structure of unstable nuclei in the sd-pf shell region by shell model with proper tensor force |
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| Authors: | Y Utsuno T Otsuka T Mizusaki M Honma |
| Institution: | (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 |
| 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. |
| Keywords: | 21 10 -k Properties of nuclei nuclear energy levels 21 60 Cs Shell model 27 40 +z 39 ≤ A ≤ 58 |
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