Approximations to the two-state impact-parameter treatment of heavy-particle collisions
- 1 September 1969
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 2 (9) , 909-912
- https://doi.org/10.1088/0022-3700/2/9/301
Abstract
The adiabatic and distortion approximations to a two-state treatment in the impact-parameter formulation of heavy-particle collisions are used to calculate the 2s and 2p single-excitation cross sections describing collisions between two ground-state hydrogen atoms with impact energy E in the range 360 ev E <or= 100 kev. Comparison with results of an exact two-state treatment shows that the adiabatic approximation accounts remarkably well for the effect of back-coupling, which is neglected in the distortion approximation and which assumes increasing importance as the impact energy is lowered.Keywords
This publication has 3 references indexed in Scilit:
- H-H interaction potentialsJournal of Physics B: Atomic and Molecular Physics, 1969
- Importance of Distortion in Inelastic Encounters Between Heavy SystemsProceedings of the Physical Society, 1959
- Non-adiabatic crossing of energy levelsProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1932