Two-electron excitation in helium-like ions by electron impact |
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| Authors: | B Padhy D K Rai |
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| Institution: | (1) Department of Physics, B.J.B. College, 751 014 Bhubaneswar, India;(2) Department of Physics, Banaras Hindu University, 221 005 Varanasi, India |
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| Abstract: | Calculation of cross-sections for the two-electron excitation in helium-like ions by electron impact employing Coulomb-Born-Oppenheimer
(CBO) approximation is presented. Analytical expressions for the differential and total scattering cross-sections without
using partial wave expansion of the wavefunction reported earlier have been used. The total and differential scattering cross-sections
for each of the excitations 1s
2
1
S* → 2s
2
1
S
e
, 2s2p
1.3
P
0, 2p
2
1
S
e
,3
P
e,1
D
e in Be2+ and B3+ are computed. Results for Li+ reported earlier are also included for comparison. |
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| Keywords: | Two-electron excitation cross-section electron impact Coulomb-Born-Oppenheimer approximation |
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