Beta Decays of Isotones with Neutron Magic Number of N=126 and R-process Nucleosynthesis

Details Beta Decays of Isotones with Neutron Magic Number of N=126 and R-process Nucleosynthesis Beta Decays of Isotones with Neutron Magic Number of N=126 and R-process Nucleosynthesis

2011-10-18

arxiv.org/abs/1110.3886v2

Physics

Nuclear Physics

Nuclear Theory

10 pages, 5 figures

Scientific paper

Beta decays of the isotones with N=126 are studied by shell model calculations taking into account both the Gamow-Teller (GT) and first-forbidden (FF) transitions. The FF transitions are found to be important to reduce the half-lives, by nearly twice to several times, from those by the GT contributions only. Possible implications of the short half-lives of the waiting point nuclei on the r-process nucleosynthesis during the supernova explosions are discussed. A slight shift of the third peak of the element abundances in the r-process toward higher mass region is found.

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