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The Gamow-Teller Resonance in Finite Nuclei in the Relativistic Random Phase Approximation | | Zhong-Yu Ma
; Bao-Qiu Chen
; Nguyen Van Giai
; Toshio Suzuki
; | | Date: |
6 Aug 2003 | | Journal: | Eur.Phys.J. A20 (2004) 429-433 | | Subject: | nucl-th | | Affiliation: | 1 and 2), Bao-Qiu Chen (1 and 2), Nguyen Van Giai and Toshio Suzuki ( China Institute of Atomic Energy, Center of Theoretical Nuclear Physics, Lanzhou, Institut de Physique Nucléaire, Fukui University and RIKEN | | Abstract: | Gamow-Teller(GT) resonances in finite nuclei are studied in a fully consistent relativistic random phase approximation (RPA) framework. A relativistic form of the Landau-Migdal contact interaction in the spin-isospin channel is adopted. This choice ensures that the GT excitation energy in nuclear matter is correctly reproduced in the non-relativistic limit. The GT response functions of doubly magic nuclei $^{48}$Ca, $^{90}$Zr and $^{208}$Pb are calculated using the parameter set NL3 and $g_0’$=0.6 . It is found that effects related to Dirac sea states account for a reduction of 6-7 % in the GT sum rule. | | Source: | arXiv, nucl-th/0308021 | | Services: | Forum | Review | PDF | Favorites | |
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