Electron impact triple differential cross sections of Xe atoms for coplanar to perpendicular plane single ionisation at 60 eV, 80 eV and 100 eV above ionization

IF 1.5 4区 物理与天体物理 Q3 OPTICS
Alpana Pandey, G. Purohit, Daiji Kato, Wolfgang Quint
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Abstract

The evolution of the triple differential cross section (TDCS) for the electron impact ionization of xenon atoms is reported for the variation of momentum of the projectile electron from a coplanar geometry to a perpendicular plane through intermediate angles with the detection plane. The TDCSs have been calculated for the Xe atoms at 60 eV, 80 eV and 100 eV above the ionization potential (IP). We have calculated the TDCS using distorted wave Born approximation (DWBA), utilizing both the first and second Born terms. Effects of target polarization and post-collision interaction (PCI) have also been included in the complete description of the collision dynamics. The TDCS results are compared with recent measurements by Patel et al. [Physical Reviews A 105, 032818 (2022)] showing a dependence between the TDCS and the scattering geometry and kinematics of the collision. Second-order effects have been found significant, particularly in the description of perpendicular plane ionization at a low energy and the effect of target polarization has been found important in describing the coplanar ionization of the xenon target. With an overall good agreement with the recent measurements, there are points of disagreement which are the motivation for further theoretical effort in the near future, as the present attempt is the first of its kind to analyse these measurements.
氙原子在电离上方 60 eV、80 eV 和 100 eV 处共面到垂直面单电离的电子撞击三重差分截面
本文报道了氙原子电子碰撞电离的三重微分截面(TDCS)的演化过程,其中抛射电子的动量通过与探测平面的中间夹角从共面几何到垂直平面的变化。计算了Xe原子在电离势(IP)以上60ev、80ev和100ev时的tdcs。我们使用畸变波玻恩近似(DWBA)计算了TDCS,同时利用了第一和第二玻恩项。靶极化效应和碰撞后相互作用(PCI)也被纳入碰撞动力学的完整描述。将TDCS结果与Patel等人最近的测量结果进行了比较。[Physical Reviews A 105, 032818(2022)]显示TDCS与碰撞的散射几何和运动学之间存在依赖关系。二阶效应已被发现是重要的,特别是在描述低能的垂直平面电离时,而靶极化效应已被发现在描述氙靶的共面电离时很重要。虽然与最近的测量结果总体上是一致的,但也有一些不一致的地方,这是在不久的将来进行进一步理论研究的动机,因为目前的尝试是首次对这些测量结果进行分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.60
自引率
6.20%
发文量
182
审稿时长
2.8 months
期刊介绍: Published twice-monthly (24 issues per year), Journal of Physics B: Atomic, Molecular and Optical Physics covers the study of atoms, ions, molecules and clusters, and their structure and interactions with particles, photons or fields. The journal also publishes articles dealing with those aspects of spectroscopy, quantum optics and non-linear optics, laser physics, astrophysics, plasma physics, chemical physics, optical cooling and trapping and other investigations where the objects of study are the elementary atomic, ionic or molecular properties of processes.
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