Author: Sunirmal Das
DOI Link: https://doi.org/10.70798/Bijmrd/03020025
Abstract: Electron impact ionization is a pivotal process in atomic and molecular physics, with significant implications in astrophysics, atmospheric science, plasma research, and semiconductor technologies. This review provides a comprehensive analysis of theoretical models and methodologies used to understand ionization cross-sections, including the Born Approximation, Khare-BEB, Kim-Rudd BEB, and Complex Spherical Optical Potential (CSOP) formalism. Emphasis is placed on the evolution of these models, their refinements, and empirical adjustments to enhance accuracy across diverse energy regimes. The study further explores the applications of ionization cross-sections in explaining natural phenomena such as auroras and comet tails, as well as their technological relevance in plasma etching and radiative modelling. Challenges in achieving precision at low-energy thresholds and the complexities posed by multi-body molecular interactions are critically discussed. Looking forward, the integration of advanced computational techniques, including machine learning, offers promising avenues for enhancing predictive capabilities in ionization modelling. This review aims to bridge the gap between theoretical advancements and practical applications, providing a valuable resource for researchers in the field.
Keywords: Electron Impact Ionization; Collision Cross-Sections; Quantum Mechanical Models; Ionization Processes; Astrophysical Plasmas; Plasma Etching
Page No: 166-180