Effect of the Tensor Force on Charge-Exchange Spin-Dependent Multipole Excitations
BAI Chun-Lin1,2**, ZHANG HUAN-Qiao1,2, ZHANG Xi-Zhen1, XU Fu-Rong2, H. Sagawa3, G. Colò4
1China Institute of Atomic Energy, Beijing 102413 2School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 3Center for Mathematics and Physics, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8560, Japan 4Dipartimento di Fisica, Universitǎdegli Studi di Milano and INFN, Sezione di Milano, 20133 Milano, Italy
Effect of the Tensor Force on Charge-Exchange Spin-Dependent Multipole Excitations
BAI Chun-Lin1,2**, ZHANG HUAN-Qiao1,2, ZHANG Xi-Zhen1, XU Fu-Rong2, H. Sagawa3, G. Colò4
1China Institute of Atomic Energy, Beijing 102413 2School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 3Center for Mathematics and Physics, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8560, Japan 4Dipartimento di Fisica, Universitǎdegli Studi di Milano and INFN, Sezione di Milano, 20133 Milano, Italy
摘要The charge-exchange spin-dipole (SD) and spin-quadrupole (SQ) strength functions of 90Zr are calculated with and without the tensor terms of the Skyrme interaction in self−consistent HF+RPA approach. It is found that, in SD and SQ transitions, the RPA correlations associated with the tensor terms shift dramatically the strengths of (Ylσ)λ=l-1 and (Ylσ)λ=l modes upward and downward, respectively, and also shift the strengths of (Ylσ)λ=l+1 modes upward. The coupling between (Yl=λ−1σ)λ and (Yl=λ+1σ)λ modes arising from the tensor correlation is noticeable. The RPA tensor correlations produce strengths of SD and SQ modes, which are distributed in a much wider energy range, and the (Ylσ)λ=l−1 modes dominate the high energy part of the strength functions. These energy shifts and coupling effects of different modes can be understood qualitatively by expressing a finite range tensor force in a separable form.
Abstract：The charge-exchange spin-dipole (SD) and spin-quadrupole (SQ) strength functions of 90Zr are calculated with and without the tensor terms of the Skyrme interaction in self−consistent HF+RPA approach. It is found that, in SD and SQ transitions, the RPA correlations associated with the tensor terms shift dramatically the strengths of (Ylσ)λ=l-1 and (Ylσ)λ=l modes upward and downward, respectively, and also shift the strengths of (Ylσ)λ=l+1 modes upward. The coupling between (Yl=λ−1σ)λ and (Yl=λ+1σ)λ modes arising from the tensor correlation is noticeable. The RPA tensor correlations produce strengths of SD and SQ modes, which are distributed in a much wider energy range, and the (Ylσ)λ=l−1 modes dominate the high energy part of the strength functions. These energy shifts and coupling effects of different modes can be understood qualitatively by expressing a finite range tensor force in a separable form.
BAI Chun-Lin;**;ZHANG HUAN-Qiao;ZHANG Xi-Zhen;XU Fu-Rong;H. Sagawa;G. Colò. Effect of the Tensor Force on Charge-Exchange Spin-Dependent Multipole Excitations[J]. 中国物理快报, 2010, 27(10): 102101-102101.
BAI Chun-Lin, **, ZHANG HUAN-Qiao, ZHANG Xi-Zhen, XU Fu-Rong, H. Sagawa, G. Colò,. Effect of the Tensor Force on Charge-Exchange Spin-Dependent Multipole Excitations. Chin. Phys. Lett., 2010, 27(10): 102101-102101.
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2010, Vol. 27 
