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On Statistical Properties of the Gamow–Teller Strength Distribution in $${}^{\mathbf{60}}$$ Ca
Physics of Atomic Nuclei ( IF 0.3 ) Pub Date : 2020-08-07 , DOI: 10.1134/s106377882002026x A. P. Severyukhin , N. N. Arsenyev , I. N. Borzov , R. G. Nazmitdinov , S. Åberg
中文翻译:
Ca $ {} ^ {\ mathbf {60}} $$ Ca中的Gamow-Teller强度分布的统计特性
更新日期:2020-08-07
Physics of Atomic Nuclei ( IF 0.3 ) Pub Date : 2020-08-07 , DOI: 10.1134/s106377882002026x A. P. Severyukhin , N. N. Arsenyev , I. N. Borzov , R. G. Nazmitdinov , S. Åberg
Abstract
The \(\beta\)-decay half-life and the delayed neutron emission of \({}^{60}\)Ca are studied within a microscopic model, which is based on the Skyrme interaction T45 to construct single-particle and phonon spaces. We observe a redistribution of the Gamow–Teller strength due to the phonon-phonon coupling and the tensor correlations, considered in the model. For \({}^{60}\)Sc, the spin-parity of the ground state is found to be \(1^{+}\). We predict that the half-life of \({}^{60}\)Ca is 0.3 ms, while the total probabilities of the \(\beta xn\) emission is 6.1%. To elucidate the obtained results, the random matrix theory has been applied to analyse the statistical properties of the \(1^{+}\) spectrum populated in the \(\beta\)-decay. We found a remarkable agreement between the GT strength distribution, obtained within the microscopic approach, and the ones, generated by means of the random coupling between the one- and two-phonon configurations.中文翻译:
Ca $ {} ^ {\ mathbf {60}} $$ Ca中的Gamow-Teller强度分布的统计特性