Electron impact ionization cross sections of hydrogen fluoride molecule

Abstract

Partial and total ionization cross sections of hydrogen fluoride molecule are determined from the ionization threshold to high energy (5 KeV) by using a modified Jain–Khare semiempirical approach. Partial single and double differential cross sections with their sums (total) through direct and dissociative ionization have been also evaluated at fixed primary electron energies 100 eV, 200 eV, and 500 eV. There is no other data for partial ionization cross sections and differential ionization cross sections for comparison. In this paper, the total ionization cross sections data have compared with available experimental data and/or with other theoretical data which are available from intermediate to high energy. It is found that the present result gives a better account for the ionization cross sections up to higher energies.

Differential ionization cross-section of hydrogen bromide

“…The present formulation 10–28 has two parts i.e., the first part is called the Bethe term providing the growing contribution of the dipole-allowed interaction whereas the second part is the Möllar term which shows the non-dipolar and indicative behavior of electron exchange in the process. The cross-sections are uniform about W/2 or (∈ + I)/2, where incident and ejected secondary electron energy of (e, 2e) processes carry equal energies.…”

“…A revisited Jain and Khare equation has been used for single differential cross sections as a function of energy loss (W) of primary /or secondary electron energy ( ε) resulting in the formation of the i th ion of a molecule is obtained by. 20–28 For the derivation of double differential cross sections (DDCS), we used equation no.2 derived by Kumar et al 18 here In the above equations W = false( ε + normalI normali false), normalS i , normalM normali 2 , normalI normali , normala 0 , ε 0 , normalC normali and R is energy loss suffered by the incident electron, the number of ionizing electrons, transition probabilities for various ionic species, ionization threshold for the production of the ith type of ion, first Bohr's radius, energy parameter, collision parameter, and the Rydberg's constant, respectively.…”

“…A revisited Jain and Khare equation has been used for single differential cross sections as a function of energy loss (W) of primary /or secondary electron energy (ε) resulting in the formation of the i th ion of a molecule is obtained by. [20][21][22][23][24][25][26][27][28] For the derivation of double differential cross sections (DDCS), we used equation no.2 derived by Kumar et al 18 here…”

“…For the determination of better results for the HBr cross-section, a revisited semi-empirical approach of Jain and Khare has been used. 10–19…”

“…For the determination of better results for the HBr cross-section, a revisited semi-empirical approach of Jain and Khare has been used. [10][11][12][13][14][15][16][17][18][19] We have determined single differential cross-sections (SDCS) at fixed electron energies (100, 200, and 500 eV). We have also calculated the double differential cross-sections (DDCS) at the same energies concerning incident angles (30 0 , and 90 0 ).…”