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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
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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.

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Zhong-Yu Ma, Bao-Qiu Chen, Nguyen Van Giai, Toshio Suzuki. 2003-08-06. The Gamow-Teller Resonance in Finite Nuclei in the Relativistic Random Phase Approximation. https://doi.org/10.1140/epja%2Fi2003-10167-2

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