Exploring the sensitivity of a-decay half-life to neutron skin thickness for nuclei around 208Pb

Based on the newest experimentally extractednuclear density distributions for double-magic nucleus208Pb (Tarbert et al. in Phys Rev Lett 112:242502, 2014),the sensitivity of a-decay half-life to nuclear skin thicknessis explored in the vicinity of the shell closure region around208Pb, i.e., isotopes...

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Bibliographic Details
Published in核技术：英文版 Vol. 28; no. 2; pp. 44 - 48
Main Author Niu Wan;Chang Xu;Zhong-Zhou Ren
Format Journal Article
LanguageEnglish
Published 2017
Subjects
cluster
Density
distribution;Neutron
half-life
model;a-decay
skin
thickness;Density-dependent
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Summary:Based on the newest experimentally extractednuclear density distributions for double-magic nucleus208Pb (Tarbert et al. in Phys Rev Lett 112:242502, 2014),the sensitivity of a-decay half-life to nuclear skin thicknessis explored in the vicinity of the shell closure region around208Pb, i.e., isotopes of Z ?82 and isotones of N ?126.With the two-parameter Fermi (2PF) density distributionsand an analytically derived formula, the a-decay half-life isfound to be closely related to the magnitude of nuclear skinthickness. For a decays to the Z ?82 isotopes, the a-decayhalf-life is found to decrease with the increasing neutronskin thickness, while the opposite behavior is found for adecays to the N ?126 isotones. Therefore, it could be apossible way to extract the nuclear skin thickness frommeasured a-decay half-lives.
Bibliography:31-1559/TL
ISSN:1001-8042
2210-3147