One- and two-electron models for electron capture by He+ions from Li0at intermediate energies
- 28 November 1984
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 17 (22) , 4515-4521
- https://doi.org/10.1088/0022-3700/17/22/012
Abstract
Total cross sections are calculated using a two-centred atomic orbital expansion for electron capture by He+ ions of energies between 1 and 400 keV from neutral lithium atoms. Two models are compared: a two-electron model in which the electrons originally in the 1s level of the He+ and the 2s level of Li0 are treated explicitly, and a one-electron model in which the captured electron moves in effective potentials due to the He+(1s) and Li+(1s2) cores. It is found that the two-electron model agrees well with the available experimental data up to 100 keV, while the one-electron model provides only fair agreement. Above 100 keV, capture from the K shell of Li0 is the dominant process and is estimated by a two-state approximation.Keywords
This publication has 16 references indexed in Scilit:
- Charge transfer in collisions between protons and lithium atomsJournal of Physics B: Atomic and Molecular Physics, 1984
- Charge transfer in He2++Li collisionsJournal of Physics B: Atomic and Molecular Physics, 1984
- Charge exchange between Cs+ions and related studiesJournal of Physics B: Atomic and Molecular Physics, 1982
- Charge exchange in He++Li collisionsPhysics Letters A, 1981
- Charge transfer in H++He+and He2++H collisionsJournal of Physics B: Atomic and Molecular Physics, 1981
- Theory of electronic transitions in slow atomic collisionsReviews of Modern Physics, 1981
- Wave functions and effective potentials of alkalilike ions. I. Lithiumlike ionsThe Journal of Chemical Physics, 1979
- Electron capture processes in ion-atom collisionsPhysics Reports, 1978
- Electron capture by fast protons in heliumProceedings of the Physical Society, 1966
- Electron capture of the accidental resonance typeProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1959