A four-state calculation of charge exchange in He+-Ar collisions using a quasimolecule model
- 11 January 1977
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 10 (1) , 81-91
- https://doi.org/10.1088/0022-3700/10/1/015
Abstract
The charge exchange in He+-Ar collisions into the channels He(1s2)+Ar+(3s3P6) (channel 1) and He (1s2)+Ar+(3p5) (channel 2) is studied theoretically at moderate impact energies from 1 keV up to 35 keV. The four molecular states arising from the atomic states of the elastic channel, channel 1 and channel 2 are used in a four-state impact-parameter calculation. Quasi-diabatic potential curves and coupling matrix elements are calculated ab initio. The strong rise of the total cross section for channel 1 at impact energies about 1 keV can be explained mainly by the direct radial coupling of the initial and final channel. For channel 1 the calculation of the cross section is in good agreement with experiment only up to 5 keV. The calculated cross section for channel 2 agrees well with experiment in the whole energy range.Keywords
This publication has 22 references indexed in Scilit:
- A diagonalization treatment of the electron translational effect in slow atom-atom collisionsJournal of Physics B: Atomic and Molecular Physics, 1976
- Theoretical investigation of the production of 2s vacancies in Ne+-Ne collisions using a quasi-molecule modelJournal of Physics B: Atomic and Molecular Physics, 1975
- Outer s-shell ionization of neon, argon and krypton by N+, Ne+and Ne2+impactJournal of Physics B: Atomic and Molecular Physics, 1975
- Collisions between rare-gas atoms at low-keV energies. II. Asymmetric collision systems: He-Ne, -Ar, -Kr, -XePhysical Review A, 1975
- Extension of the Electron-Promotion Model to Asymmetric Atomic CollisionsPhysical Review A, 1972
- Excitation of Ne, Ar, Kr and Xe by He+ impact (0.3–10 keV)Physica, 1969
- Charge transfer and ionization by positive ions in the energy range 60 to 450 keVProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963
- Excitation of Ne, Ar, and Kr Induced byandImpact (5-35 keV)Physical Review B, 1963
- Electron capture in slow collisionsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958
- Charge Exchange Cross Sections for Helium Ions in GasesPhysical Review B, 1958