Neutron skin thickness of ⁴⁸Ca, ¹³²Sn and ²⁰⁸Pb with KIDS density functional

2021/12/02 by Hyun, Chang Ho
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2112.00996

Abstract

Neutron skin thickness (R_np) of the atomic nuclei ⁴⁸Ca, ¹³²Sn and ²⁰⁸Pb are considered in the KIDS (Korea:IBS-Daegu-Sungkyunkwan) density functional formalism. Model parameters most relevant to R_np are constrained from standard nuclear data and neutron star properties determined from modern observations. Mean values of R_np are obtained as 0.161, 0.220 and 0.160 fm for ⁴⁸Ca, ¹³²Sn and ²⁰⁸Pb, respectively, and the corresponding standard deviations are 0.011, 0.020 and 0.021 fm. Correlations between R_np of the three nuclei are considered, and we find that R_np's are correlated very strongly. We obtain correlation coefficient 0.978 between R_np of ⁴⁸Ca and ²⁰⁸Pb, and 0.996 between R_np of ¹³²Sn and ²⁰⁸Pb.

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