Ionization cross sections and probabilities for removal of2sand2patomic electrons in the binary-encounter approximation

1974 ◽  
Vol 10 (1) ◽  
pp. 182-189 ◽  
Author(s):  
J. H. McGuire ◽  
K. Omidvar
Keyword(s):  
Cross Sections ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Binary Encounter Approximation ◽  
Binary Encounter

Binary encounter calculations on electron impact double ionization of noble gas atoms

1978 ◽  
Vol 56 (9) ◽  
pp. 1255-1260 ◽  
Author(s):  
A. Kumar ◽  
B. N. Roy
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Noble Gas ◽  
Double Ionization ◽  
Distribution Functions ◽  
Hartree Fock ◽  
Velocity Distribution Functions ◽  
Ionization Cross Sections ◽  
Binary Encounter Approximation ◽  
Binary Encounter

Electron impact double ionization cross sections of noble gas atoms have been calculated in the binary encounter approximation by using Gryzinski's double binary encounter model. The correct expression for σΔE including exchange and interference as given by Vriens has been used. Hartree–Fock and hydrogenic velocity distribution functions have been used in considering the ejection of the first and the second atomic electron, respectively. Contribution of ionization from inner-shell has also been taken into account. Calculated values of cross sections are found to be in agreement with the experimental observations.

scholarly journals He2+ Impact Single Ionization Cross Sections of Fe Atom

2020 ◽  
Vol 6 (2) ◽  
pp. 127-133
Author(s):  
S. P. Gupta ◽  
K. Yadav ◽  
R. Khanal ◽  
L. K. Jha
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Impact Energy ◽  
Theoretical Calculations ◽  
Ionization Cross ◽  
Single Ionization ◽  
Hartree Fock ◽  
Ionization Cross Sections ◽  
Binary Encounter Approximation ◽  
The Given

Binary encounter approximation has been used for theoretical calculations of alpha particle (He2+) impact single ionization cross sections of iron atom at ground state in the energy range of 35 to 360 keV/amu. The cross sections for energy transfer given by Vriens’ and quantum mechanical Hartree-Fock velocity distributions for target electron have been used in the calculation. The contributions in total single ionization cross sections from 4s and 3d subshells are observed to be higher than from 3p, and the contributions from 4s decreases with increase of impact energy whereas the contribution from 3d increases. The total single ionization cross sections decrease gradually with the increase of impact energy similar to experimental results which implies that our results are in satisfactory agreement with the experimental data in the given energy range.

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