论文标题
质子引起的$α$敲除反应的有效极化
Effective polarization in proton-induced $α$ knockout reactions
论文作者
论文摘要
在扭曲的波冲脉冲近似框架中研究了质子诱导的$α$敲除反应中残留核的有效极化。发射的$α$粒子的强吸收会根据核心内部$α$粒子的单粒子轨道角动量的第三个成分而对反应“位置”产生强烈的选择性，因此在反应残基的自旋方向上。这是由类似于Maris效应的机制引起的，Maris效应是质子诱导的质子敲除反应的有效极化。但是，作为在$α$敲除过程中有效极化的独特特征，反应颗粒的自由度无作用。具有完整运动学的$α$敲除工艺对于残留核可能是一种有用的极化技术，而无需主动控制质子的旋转。
The effective polarization of the residual nucleus in the proton-induced $α$ knockout reaction is investigated within the distorted wave impulse approximation framework. The strong absorption of the emitted $α$ particle results in strong selectivity on the reaction "position" depending on the third component of the single-particle orbital angular momentum of the $α$ particle inside a nucleus, hence on the spin direction of the reaction residue. This is caused by a mechanism that is similar to the Maris effect, the effective polarization in the proton-induced proton knockout reactions. However, as a distinct feature of the effective polarization in the $α$ knockout process, the spin degrees of freedom of the reacting particles play no role. The $α$ knockout process with complete kinematics can be a useful polarization technique for the residual nucleus, without actively controlling the spin of the proton.
