论文标题
研究（$ p，n $）IAS和（$^3 $ he，$ t $）IAS Chuse-Exchange反应与$ G $ -MATRIX折叠方法
Study of ($p,n$)IAS and ($^3$He,$t$)IAS charge-exchange reactions with the $G$-matrix folding method
论文作者
论文摘要
（$ p，n $）和（$^3 $ he，$ t $）电荷 - 交换反应的差分横截面，导致目标核的同异碱模拟状态（IAS）激发的反应是通过扭曲的波生近似值计算的。 $ G $ -MATRIX双重折叠方法用于确定泳道模型框架内的核核核电势。 $ g $ - amatrices是从Brueckner-Hartree-fock使用Argonne Av18核子核子电位获得的。目标密度是从天际 - 哈特里量计算中获取的，这些计算预测了与当前现有数据兼容的重核的中子皮肤厚度的值。将计算与$^{14} $ c在$ e_ {lab} = 135 $ MEV和$^{48} $ ca at $ e_ {lab} = 134 $ meV和$ e_ {lab} = 160 $ meV，以及（$^3 $ ni and $ e_ {lab} = 160 $ ni的$ e_ {lab} = 134 $ e _ at $ e_ {lab} = 135 $ mev和$ e_ {lab} = 135 $ e _ at $ e_ {lab} = 160 $^$ ni as上的反应数据（$ p，n $）IAS的实验数据（$ p，n $） $^{90} $ zr和$^{208} $ pb at $ e_ {lab} = 420 $ mev。实验结果得到很好的描述，无需重新缩放光电位的强度。在$^{58} $ ni和$^{90} $ ZR目标的（$^3 $ He，$ t $）IAS反应的差分横截面的描述中有了明显的改进。我们的结果表明，$ g $ - amatrices的密度和同胞依赖性在实验数据的描述中起不可忽略的作用。
Differential cross sections of ($p,n$) and ($^3$He,$t$) charge-exchange reactions leading to the excitation of the isobaric analog state (IAS) of the target nucleus are calculated with the distorted wave Born approximation. The $G$-matrix double-folding method is employed to determine the nucleus-nucleus optical potential within the framework of the Lane model. $G$-matrices are obtained from a Brueckner-Hartree-Fock calculation using the Argonne Av18 nucleon-nucleon potential. Target densities have been taken from Skyrme-Hartree-Fock calculations which predict values for the neutron skin thickness of heavy nuclei compatible with current existing data. Calculations are compared with experimental data of the reactions ($p,n$)IAS on $^{14}$C at $E_{lab}=135$ MeV and $^{48}$Ca at $E_{lab}=134$ MeV and $E_{lab}=160$ MeV, and ($^3$He,$t$)IAS on $^{58}$Ni, $^{90}$Zr and $^{208}$Pb at $E_{lab}=420$ MeV. Experimental results are well described without the necessity of any rescaling of the strength of the optical potential. A clear improvement in the description of the differential cross sections for the ($^3$He,$t$)IAS reactions on $^{58}$Ni and $^{90}$Zr targets is found when the neutron excess density is used to determine the transition densities. Our results show that the density and isospin dependences of the $G$-matrices play a non-negligible role in the description of the experimental data.
