Charge transfer between S{sup 2+} and He: A comparative study of quantal and semiclassical approaches
Journal Article
·
· Physical Review. A
- Department of Physics and Astronomy and the Center for Simulational Physics, University of Georgia, Athens, Georgia 30602-2451 (United States)
A comparative study of charge transfer in collisions of ground-state S{sup 2+} ions with He has been performed within fully quantal and semiclassical molecular-orbit close-coupling approaches. The processes for capture into S{sup +}({sup 4}S{sup 0},{sup 2}D{sup 0},{sup 2}P{sup 0})+He{sup +} are taken into account. Quantal and semiclassical cross sections were evaluated, respectively, in the diabatic and adiabatic representations and found to be in good agreement. The calculations show that at collision energies below about 40 eV/u, the charge-transfer processes are dominated by S{sup 2+}({sup 3}P)+He{yields}S{sup +}({sup 2}D{sup 0})+He{sup +}, and capture into the {sup 2}P{sup 0} and {sup 4}S{sup 0} states becomes comparable with that into the {sup 2}D{sup 0} state above 40 eV/u and 600 eV/u, respectively. The multireference single- and double-excitation configuration-interaction method was utilized to obtain adiabatic potentials and nonadiabatic coupling matrix elements. A detailed comparison of quantal and semiclassical transition probabilities is discussed. State-selective and total rate coefficients are presented with temperatures between 10 000 K and 5.0x10{sup 6} K.
- OSTI ID:
- 20718557
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electron capture in collisions of S with H{sup +}
Single- and double-electron capture processes in low-energy collisions of N{sup 3+} with He
{ital Ab initio} study of charge transfer in low-energy collisions of Si{sup 4+} with helium
Journal Article
·
Wed Jun 15 00:00:00 EDT 2005
· Physical Review. A
·
OSTI ID:20717925
Single- and double-electron capture processes in low-energy collisions of N{sup 3+} with He
Journal Article
·
Sat Oct 15 00:00:00 EDT 2011
· Physical Review. A
·
OSTI ID:22095350
{ital Ab initio} study of charge transfer in low-energy collisions of Si{sup 4+} with helium
Journal Article
·
Fri Jan 31 23:00:00 EST 1997
· Physical Review A
·
OSTI ID:488757