Resonant scattering of positronium as a quasifree electron
Resonant scattering of positronium as a quasifree electron
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正电子素作为准自由电子的共振散射
DOI：
10.1103/physreva.95.032704
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发表时间：
2017
影响因子：
2.9
通讯作者：
Shipman M
中科院分区：
文献类型：
--
作者：
Shipman M
为了阐明正电子素 (Ps) 的类电子行为及其共振散射观察结果背后的物理原理，我们测量了总横截面，发现它也表现出重要的结构。共振分析表明，Ps 在碰撞中被扭曲，经典轨迹蒙特卡罗计算表明，电子平均比正电子更接近目标，而正电子可能反过来与随后出现的临时负离子共振结合。这种对 Ps 共振性质的描述与长期以来的理论预测一致。
In order to clarify the physics underlying the observations of the electronlike behavior of positronium (Ps) and its resonant scattering from, we have measured thetotal cross section and found it also to exhibit significant structure. Analysis of the resonances reveals that Ps is distorted in the collisions and classical trajectory Monte Carlo calculations indicate that the electron is on average closer to the target than the positron, which may in turn bind resonantly to the ensuing temporary negative ion. This description of the nature of Ps resonances agrees with long-standing theoretical predictions.