https://doi.org/10.1051/epjconf/201819402008
Two-phonon structures for beta-decay theory
1
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
2
Dubna State University, 141982 Dubna, Moscow region, Russia
3
National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
4
Mathematical Physics, Lund University, PO Box 118, S-22100 Lund, Sweden
* e-mail: sever@theor.jinr.ru
Published online: 14 November 2018
The β-decay rates of 60Ca have been 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, considered in the model. For 60Sc, the spin-parity of the ground state is found to be 1+. We predict that the half-life of 60Ca is 0.3 ms, while the total probability of the βxn emission is 6:1%. Additionally, the random matrix theory has been applied to analyze the statistical properties of the 1+ spectrum populated in the β-decay to elucidate the obtained results.
© The Authors, published by EDP Sciences, 2018
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