1Department of Chemistry, Baba Mast Nath University, Ashtal Bohar, Rohtak, Haryana, India
2Department of Biomedical Engineering, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonepat, Haryana, India
*Corresponding Author: Ravinder Sharma, Department of Chemistry, Baba Mast Nath University, Asthal Bohar, Rohtak, Haryana-124021, India, E-mail: ravindersharma591@gmail.com
Online published on 27 February, 2018.
This review pertains to the various semi-empirical methods used to calculate collision cross-section of atomic particles (from mono to polyatomic particles having mass from 1 amu to about 120 amu) by electron impact ionization process have been discussed. The semi-empirical methods mostly used for finding the precise crosssection data theoretically, where experimental data is not available and/or have limited data. Moreover, the paper describes advancement of these methods for calculating cross-section for complex molecules also. Some remarkable applications in applied sciences are also discussed. The paper discusses the various theoretical formalisms used by different authors with different parameters such as Born Approximation, Binary Encounter Bethe, R-matrix method, Spherical complex optical potential and among others. Those were improved time to time for the better result to determine total cross-section data.
Scattering processes, electron impact ionization cross-section, semiempirical approach
