l-changing collisions in the intermediate Rydberg states of lithium
l-mixing collisions Li(n/sup 2/D)+X..-->..Li(n/sup 2/L,L>2)+X induced in Rydberg states of lithium (n = 4,5,...,13) by rare-gas atoms or Li ground-state atoms are studied in a heat-pipe arrangement. The l-mixing cross sections deduced from the time analysis of the n/sup 2/D laser-induced fluorescence agree with experimental values obtained with the heavier alkali-metal atoms and with different theoretical models developed for quasielastic Rydberg-electron--target collisions. Quenching of the n/sup 2/D fluorescence at higher rare-gas pressures is interpreted as inelastic collisional transfer of the L> or =1 mixed states to the nonhydrogenic S sublevel. Finally the radiative lifetimes of the n/sup 2/D states and n/sup 2/L mixed states with L> or =1 are deduced, respectively, from the low-pressure limit and intermediate-pressure study of the n/sup 2/D fluorescence relaxation rate.
- Research Organization:
- Groupe de Recherches sur l'Energie des Milieux Ionises, Universite d'Orleans, F-45046 Orleans Cedex, France
- OSTI ID:
- 5923255
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 31:3; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
CONFIGURATION MIXING
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
FLUORESCENCE
GASES
GROUND STATES
HEAT PIPES
INTERACTIONS
LIFETIME
LITHIUM
LUMINESCENCE
METALS
NONMETALS
QUENCHING
RADIATIVE DECAY
RARE GASES
RYDBERG STATES