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arXiv · 2201.02083

Shell-model study on properties of proton dripline nuclides with Z, N = 30-50 including uncertainty analysis

Boshuai Cai·Guangshang Chen·Cenxi Yuan·Jianjun He
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Abstract

The binding energies and proton separation energies of nuclides with $Z, N = 30-50$ are investigated, based on the shell model with an uncertainty analysis through statistical methods. Several formulas are used to obtain the binding energies and proton separation energies according to the shell-model calculations. The non-parametric Bootstrap method is applied to establish an uncertainty decomposition and recomposition framework. Moreover, it is used to estimate the stability of proton(s) emission for each nuclide. Two formulas for calculating the binding energies with a systematic uncertainty of $\sim0.3$ MeV are proposed, and a reliable extrapolation ability is examined. These binding energy formulas deduce similar forms of respective $S_{p}$ and $S_{2p}$ energies, which predict the extension of the nuclear boundary of this region. A nice description of the binding energies and proton separation energies is provided. The one- and two-proton separation energies and partial half-lives of proton emitting are predicted, thus showing a new dripline. Besides, there are 30 unstable nuclides predicted to be bound against proton(s)-emission. These nuclear properties will be useful in nuclear astrophysics.

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Boshuai Cai, Guangshang Chen, Cenxi Yuan, Jianjun He. 2022-05-05. Shell-model study on properties of proton dripline nuclides with Z, N = 30-50 including uncertainty analysis. https://doi.org/10.1088/1674-1137%2Fac6cd7

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