论文标题
$^{115} $ sn的核水平密度和热能性能来自中子蒸发
Nuclear level density and thermal properties of $^{115}$Sn from neutron evaporation
论文作者
论文摘要
$^{115} $ sn的核水平密度已在$ \ sim $ 2-9 MEV的激发能量范围内使用$^{115} $ in（$ p，n $）$^{115} $ sn反应的实验性中子蒸发光谱进行测量。将实验水平的密度与微观Hartree-fock BC（HFBC），Hartree-Fock-Bogoliubov Plus Combinatorial（HFB+C）以及精确的配对加独立的粒子模型（EP+IPM）计算进行了比较。据观察，EP+IPM提供了对实验数据的最准确描述。已经从测得的水平密度研究了$^{115} $ sn的热性能（熵和温度）。实验温度曲线以及计算出的热容量显示了从强型核相过渡到该核中弱配对的特征的不同特征。
The nuclear level density of $^{115}$Sn has been measured in an excitation energy range of $\sim $2 - 9 MeV using the experimental neutron evaporation spectra from the $^{115}$In($p,n$)$^{115}$Sn reaction. The experimental level densities were compared with the microscopic Hartree-Fock BCS (HFBCS), Hartree-Fock-Bogoliubov plus combinatorial (HFB+C), and an exact pairing plus independent particle model (EP+IPM) calculations. It is observed that the EP+IPM provides the most accurate description of the experimental data. The thermal properties (entropy and temperature) of $^{115}$Sn have been investigated from the measured level densities. The experimental temperature profile as well as the calculated heat capacity show distinct signatures of a transition from the strongly-paired nucleonic phase to the weakly paired one in this nucleus.
