论文标题
$^{26} $ mg和$^{10} $的激发状态中的中子优势由Proton和Alpha Inlpha Inthastic散射探测
Neutron dominance in excited states of $^{26}$Mg and $^{10}$Be probed by proton and alpha inelastic scattering
论文作者
论文摘要
$^{26} $ mg和$^{10} $中的核激发的同胞字符通过Proton（$ P $）和Alpha（$α$）的非弹性散射研究。使用反对称分子动力学（AMD）的结构模型来计算$^{26} $ mg和$^{10} $ Be的地面和激发态。该计算描述了地面频带$ 2^+_ 1 $（$ k^π= 0^+_ 1 $）的激发的iSscalar特征，并预测了侧频带$ 2^+_ 2 $（$ k^π= 2^+$）的中子优势，in $^{26}} $ mg和$ mg和$ mg和$ mg和$ mg and $ mg and $^{10} $。 $ p $和$α$非弹性散射从$^{26} $ mg和$^{10} $ be通过使用AMD计算的目标核的物质和过渡密度来计算微观耦合 - 通道（MCC）计算。 The calculation reasonably reproduces the observed $0^+_1$, $2^+_1$, and $2^+_2$ cross sections of $^{26}$Mg+$p$ scattering at incident energies $E_p=$24 and 40 MeV and of $^{26}$Mg+$α$ scattering at $E_α=$104 and 120 MeV.对于$^{10} $ be+$ p $和$^{10} $ be+$α$散射，在$ k^π= 0^+_ 1 $ ground-，$ k^π= 2^+$ side-，$ k^+_ 1 $ k^y = 2^+$ side-，$ k^y $ k^π= 0^+_ 2 $ _ 2 $ cluster-k^^-b中，通过比较$^{10} $ be+$ p $，$^{10} $ be+$ a $和$^{10} $ c+$ p $ reactions，通过非弹性散射过程进行了激发字符。结果预测，$ 2^+_ 2 $状态是由$^{10} $ be+$ p $反应选择性产生的，因为$ 2^+_ 2 $激发的中子优势是$^{26} $^{26} $ mg+$ p $ $ p $ sctivation to $ 2^+_ 2 $ state $ $ $ $ $ $^$ $^$^$^$^$^$^$^10 c。
Isospin characters of nuclear excitations in $^{26}$Mg and $^{10}$Be are investigated via proton($p$) and alpha($α$) inelastic scattering. A structure model of antisymmetrized molecular dynamics (AMD) is applied to calculate the ground and excited states of $^{26}$Mg and $^{10}$Be. The calculation describes the isoscalar feature of the ground-band $2^+_1$($K^π=0^+_1$) excitation and predicts the neutron dominance of the side-band $2^+_2$($K^π=2^+$) excitation in $^{26}$Mg and $^{10}$Be. The $p$ and $α$ inelastic scattering off $^{26}$Mg and $^{10}$Be is calculated by microscopic coupled-channel (MCC) calculations with a $g$-matrix folding approach by using the matter and transition densities of the target nuclei calculated with AMD. The calculation reasonably reproduces the observed $0^+_1$, $2^+_1$, and $2^+_2$ cross sections of $^{26}$Mg+$p$ scattering at incident energies $E_p=$24 and 40 MeV and of $^{26}$Mg+$α$ scattering at $E_α=$104 and 120 MeV. For $^{10}$Be+$p$ and $^{10}$Be+$α$ scattering, inelastic cross sections to the excited states in the $K^π=0^+_1$ ground-, $K^π=2^+$ side-, $K^π=0^+_2$ cluster-, and $K^π=1^-$ cluster-bands are investigated. The isospin characters of excitations are investigated via inelastic scattering processes by comparison of the production rates in the $^{10}$Be+$p$, $^{10}$Be+$α$, and $^{10}$C+$p$ reactions. The result predicts that the $2^+_2$ state is selectively produced by the $^{10}$Be+$p$ reaction because of the neutron dominance in the $2^+_2$ excitation as in the case of the $^{26}$Mg+$p$ scattering to the $2^+_2$ state, whereas its production is significantly suppressed in the $^{10}$C+$p$ reaction.
