Abstract
The theoretical model, developed by S.P. Khare, has been modified to evaluate the total cross sections for ionization of Chromium atom due to electron impact at incident electron energy from ionization threshold to 6000 eV. The various calculated cross sections are in remarkable agreement with available experimental data and other theoretical cross sections. For Chromium atom, good agreement between theory and experiment is achieved. Objective: Our objective is to find the partial and total ionization cross sections for Chromium atom and its fragmentation ion at different energy levels and interpretation of results with other available data. Method:-The theoretical semi-empirical model, developed by S.P. Khare, has been remodeling to evaluate the total cross sections for ionization of Chromium atom due to electron impact at incident electron energy from ionization threshold to 6000eV. Findings: A good agreement is observed when we compared our data for electron impact ionization cross section for Cr6+, Cr7+, Cr8+ and Cr10+ fragment ions. Also some disagreement is found between our data and other available data. Our results are higher for Cr7+, Cr8+ fragment ions. For Chromium atom, good agreement between theory and experiment is achieved. Novelty: Electron impact ionization is engaged to produce positive and negative ions in many areas of physics and chemistry such as plasma studies, fusion modeling, radiation physics and gas discharges to more abstract applications such as astrophysical applications and modeling of planetary atmospheres. Keywords: cross- section; impact; spectroscopy
Highlights
In fundamental physics, one of the critical issues is the few body problems where we need to deal with more than two particles
Bhatt & Kumar / Indian Journal of Science and Technology 2021;14(2):170–180 In Figures 4 and 5, we report the cross sections for the production of Cr4+ and Cr5+ ions through electron impact from threshold to 5000 eV
In this work we calculated electron impact ionization cross sections for chromium atom using semi-empirical model developed by Jain & Khare
Summary
One of the critical issues is the few body problems where we need to deal with more than two particles. Theoretical and experimental research on electron scattering from atoms and molecules is a century old but active field of scientific endeavor and it continues to find a wide variety of applications in natural and man-made systems [3,4]. Two of the more successful recent theories for calculating the energy dependence of the electron impact ionization cross-section are the binary-encounter-dipole (BED) theory and Deutsch-Mark (DM) Both of these theories are relatively easy to apply to small molecules. It is notable that electron is the most suitable projectile for scattering experiments and electron impact collisions with atoms and molecules have been extensively studied by both experimentalists and theorists since the early years of the last century [12,13]. We have seen a remarkable renaissance in both experimental and theoretical activities in the study of electron collision processes with molecules in the past ten years or so [14]
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