Beyond-mean-field calculations of allowed and first-forbidden β− decays of r-process waiting-point nuclei

EPJ Web of Conferences

卷:260

Litvinova Elena¹  Martínez-Pinedo Gabriel²  Robin Caroline² 

[1] Department of Physics, Western Michigan University;

[2] GSI Helmholtzzentrum für Schwerionenforschung;

关键词: ;   

DOI  :  10.1051/epjconf/202226003002

来源: DOAJ

【 摘 要 】

β-decay rates of neutron-rich nuclei, in particular those located at neutron shell closures, play a central role in simulations of the heavy-element nucleosynthesis and resulting abundance distributions. We present β-decay half-lives of even-even N = 82 and N = 126 r-process waiting-point nuclei calculated in the approach based on relativistic quasiparticle random phase approximation with quasiparticle-vibration coupling. The calculations include both allowed and first-forbidden transitions. In the N = 82 chain, the quasiparticlevibration coupling has an important impact close to stability, as it increases the contribution of Gamow-Teller modes and improves the agreement with the available data. In the N = 126 chain, we find the decay to proceed dominantly via first-forbidden transitions, even when the coupling to vibrations is included.

【 授权许可】

Unknown