Inelastic electronic excitation and electron transfer processes in collisions between Mg(3 {sup 1}S{sub 0}) atoms and K{sup +}({sup 1}S{sub 0}) ions studied by crossed beams in the 0.10-3.80-keV energy range
- Departament de Quimica Fisica, Centre de Recerca en Quimica Teorica (CeRQT)/Parc Cientific de Barcelona, Universitat de Barcelona, Marti i Franques, 1, 08028 Barcelona (Spain)
Inelastic and charge-transfer excitation processes in collisions between ground-state neutral Mg atoms and K{sup +} ions have been studied by means of a crossed molecular-beam technique. Decay fluorescent emissions from Mg(3 {sup 1}P{sub 1}),Mg(4 {sup 3}S{sub 1}), and Mg(3s{sup 1}3d{sup 1},3 {sup 3}D{sub 3,2,1}) as well as the phosphorescent emission due to Mg(3 {sup 3}P{sub 1}) have been observed from excited Mg atoms and the charge-transfer emission decays from K(4 {sup 2}P{sub 3/2,1/2}),K(5 {sup 2}P{sub 3/2,1/2}),K(6 {sup 2}S{sub 1/2}), and K(4 {sup 2}D{sub 5/2,3/2}) for excited K atoms. The corresponding absolute cross-sections values versus collision energy functions were determined in the 0.10-3.80 keV laboratory energy range. In order to interpret the experimental results, accurate ab initio full configuration-interaction calculations using pseudopotentials have been performed for the (Mg-K){sup +} system, giving a manifold of adiabatic singlet and triplet potential-energy curves correlating with the different collision channels, which allow a qualitative interpretation of the emission excitation functions measured for the different processes studied. A comparative study with other Mg-alkali ion systems previously studied is also included.
- OSTI ID:
- 20723075
- Journal Information:
- Journal of Chemical Physics, Vol. 123, Issue 12; Other Information: DOI: 10.1063/1.2041407; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CATIONS
CHARGE EXCHANGE
COLLIDING BEAMS
CONFIGURATION INTERACTION
ELECTRON TRANSFER
EV RANGE 100-1000
EXCITATION
EXCITATION FUNCTIONS
EXCITED STATES
FLUORESCENCE
GROUND STATES
ION-ATOM COLLISIONS
KEV RANGE 01-10
MAGNESIUM
MOLECULAR BEAMS
PHOSPHORESCENCE
POTASSIUM IONS
POTENTIAL ENERGY