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arXiv 1902.00852nucl-th
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基于Hartree-Fock-Bogoliubov形式的Jost函数

Jost function based on the Hartree-Fock-Bogoliubov formalism

K. Mizuyama, N. Nhu Le, T. Dieu Thuy, T. V. Nhan Hao

摘要:

本文在Hartree-Fock-Bogoliubov(HFB)理论的基础上,建立了描述原子核超流性的Jost函数体系。基于HFB的Jost函数可以给出考虑对效应的开壳层核弹性散射S矩阵的解析表示。采用Woods-Saxon势,给出了两种费米能情况下,S矩阵极点及其轨迹随对强度变化的数值结果。分析了各种情况下中子弹性散射的总截面,证实了在截面中可以看到一些由配对效应引起的交错形状或尖锐共振。

英文摘要:

We formulate the Jost function formalism based on the Hartree-Fock-Bogoliubov (HFB) theory which has been used to represent the nature of the superfluidity of nucleus. The Jost function based on the HFB can give the analytic representation of the S-matrix for the nucleon elastic scattering targeting on the open-shell nucleus taking into account the pairing effect. By adopting the Woods-Saxon potential, we show the numerical results of S-matrix poles and their trajectories with varying the pairing strength in two cases of Fermi energies. The total cross sections in each cases for neutron elastic scattering are also analyzed, and we confirmed some staggering shapes or sharp resonances originated from the effect of pairing can be seen in the cross section.

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