Theoretical study of ion-pair formation and Penning and associative ionization in low- to intermediate-energy He sup * (2 sup 1,3 S )+Li collisions
- Argonne National Laboratory, Argonne, Illinois 60439 (USA) Department of Physics, Rice University, Houston, TX (USA)
- Department of Physics, Rice Quantum Institute, Rice University, Houston, TX (USA)
A semiclassical treatment based on a molecular orbital expansion is used to study ion-pair formation and Penning- and associative-ionization processes in He{sup *}(2 {sup 1,3}{ital S})+Li collisions in the energy regime from 100 to 1000 eV. Although these processes are usually important in different energy ranges, here they are found to compete with each other to an appreciable degree and hence to provide a rare opportunity for investigating collision dynamics that require an equal-footing treatment between autoionization to the continuum and a discrete transition. The present cross sections for these processes compare favorably with the measurement of Wang, Tang, and Neynaber (J. Phys. B 20, 1527 (1987)).
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7058702
- Journal Information:
- Physical Review, A (General Physics); (USA), Vol. 41:11; ISSN 0556-2791
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HELIUM
ATOM-ATOM COLLISIONS
LITHIUM
CROSS SECTIONS
EV RANGE 100-1000
IONIZATION
METASTABLE STATES
MOLECULAR IONS
PAIR PRODUCTION
PENNING EFFECT
SEMICLASSICAL APPROXIMATION
ALKALI METALS
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EXCITED STATES
FLUIDS
GASES
INTERACTIONS
IONS
METALS
NONMETALS
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena