标题： 在$^{12}$C 的$(e,e'γ)$反应中$2^+_1$状态的激发 显示英文标题

标题： On the excitation of the $2^+_1$ state in $^{12}$C in the $(e,e'γ)$ reaction

摘要： 通过4.439 MeV的碳$2^+$状态由$70-150$MeV电子碰撞激发，并随后通过光子辐射衰减到基态，这是在变形波玻恩近似中描述的。 跃迁密度是从核准粒子声子模型中获得的。 光子角分布与早期结果和实验进行了比较，包括轫致辐射的影响。 还对极化电子碰撞情况下的自旋不对称性进行了预测。 显示英文摘要

摘要： The excitation of the carbon $2^+$ state at 4.439 MeV by $70-150$ MeV electron impact and its subsequent decay to the ground state by photon emission is described within the distorted-wave Born approximation. The transition densities are obtained from the nuclear quasiparticle phonon model. The photon angular distributions are compared with earlier results and with experiment, including the influence of bremsstrahlung. Predictions for spin asymmetries in the case of polarized electron impact are also made.