论文标题
质子和α粒子非弹性散射的微观计算，以研究$^{6} $ He和$^{8} $的激发态
Microscopic calculation of proton and alpha-particle inelastic scattering to study the excited states of $^{6}$He and $^{8}$He
论文作者
论文摘要
$ p+{}^6 \ textrm {he} $，$ p+{}^8 \ textrm {he} $和$α+{}^8 \ textrm {he} $使用墨尔本$ g $ -matrix fortientitive at the the thee thee Rection， $ {}^6 \ textrm {he} $和$ {}^8 \ textrm {he} $由反对称分子动力学的微观结构模型（AMD）获得。 $ p+{}^6 \ textrm {he} $和$ p+{}^8 \ textrm {he} $反应进行了调查$ {}^6 \ textrm {he} $ _ {2^+_ _ 1）（2^+_ 1） $ {}^8 \ textrm {He}（2^+_ 1）$状态。 MCC+AMD计算复制了$ p+{}^6 \ textrm {He} $的弹性横截面，$ e = 40.9 $ meV/a和$ p+{}^8 \ textrm {he} $ e = 32.5 $ e = 32.5 $和72 mev/a的反应，这两者都经过了kinem kinem，she} $ e反应。 For $p+{}^6\textrm{He}$ inelastic scattering to the $2^+_1$ state, the calculated result was in reasonable agreement with the $(p,p')$ data at $E=24.5$ and 40.9 MeV/A and supported the AMD prediction of the neutron transition matrix element $M_n=7.9$ fm$^2$.对于$ p+{}^8 \ textrm {he} $非弹性散射到$ {}^8 \ textrm {he}（2^+_ 1）$，MCC+AMD计算超出了$（p，p，p，p，p，p，p，p，p，p，p，p'）$ cross $ e = 72 $ mev/a a = 72 $ mev/a a a。根据现象学模型分析，$ m_n $值在4--6 fm $^2 $范围内受到青睐，以重现$ {}^8 \ textrm {he}（2^+_ 1）$ $ p+{}^}^8 \ textrm {He} $ e Affers $ p+p+p+p+p+p+p+{对于$α+{}^8 \ textrm {He} $反应，MCC+AMD计算在$ e = 26 $ meV/a处重现了弹性横截面。 （$ p，p'$）和（$α，α'$）的理论预测$ {}^8 \ textrm {he}（0^+_ 2）$，$ {}^8 \ textrm {he}（1^-_ 1） $ {}^8 \ textrm {He}（3^-_ 1）$状态也得到了。
Elastic and inelastic cross sections of the $p+{}^6\textrm{He}$, $p+{}^8\textrm{He}$, and $α+{}^8\textrm{He}$ reactions were investigated using the Melbourne $g$-matrix folding approach with the theoretical densities of ${}^6\textrm{He}$ and ${}^8\textrm{He}$ obtained by a microscopic structure model of antisymmetrized molecular dynamics (AMD). Microscopic coupled-channel (MCC) calculations of the $p+{}^6\textrm{He}$ and $p+{}^8\textrm{He}$ reactions were performed to investigate transition properties of the ${}^6\textrm{He}(2^+_1)$ and ${}^8\textrm{He}(2^+_1)$ states. The MCC+AMD calculations reproduced elastic cross sections of the $p+{}^6\textrm{He}$ reaction at $E=40.9$ MeV/A and of the $p+{}^8\textrm{He}$ reaction at $E=32.5$ and 72 MeV/A, which have both been measured by inverse kinematics experiments. For $p+{}^6\textrm{He}$ inelastic scattering to the $2^+_1$ state, the calculated result was in reasonable agreement with the $(p,p')$ data at $E=24.5$ and 40.9 MeV/A and supported the AMD prediction of the neutron transition matrix element $M_n=7.9$ fm$^2$. For the $p+{}^8\textrm{He}$ inelastic scattering to ${}^8\textrm{He}(2^+_1)$, the MCC+AMD calculation overshot the $(p,p')$ cross sections at $E=72$ MeV/A by a factor of three. According to a phenomenological model analysis, $M_n$ values in the range of 4--6 fm$^2$ were favored to reproduce the ${}^8\textrm{He}(2^+_1)$ cross sections of the $p+{}^8\textrm{He}$ reaction at $E=72$ MeV/A. For the $α+{}^8\textrm{He}$ reaction, the MCC+AMD calculation reproduced the elastic cross sections at $E=26$ MeV/A. Theoretical predictions of the ($p,p'$) and ($α,α'$) cross sections to the ${}^8\textrm{He}(0^+_2)$, ${}^8\textrm{He}(1^-_1)$, ${}^8\textrm{He}(2^+_3)$ and ${}^8\textrm{He}(3^-_1)$ states are also given.
