Collisional relaxation of the 6 s (3/2) sub 1 sup 0 and 6 s prime (1/2) sub 1 sup 0 m sub J levels of xenon using resonantly enhanced multiphoton ionization

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.41.1457· OSTI ID:6850998

Charalambidis, D; Lyras, A ^[1]; Lambropoulos, P; Tang, X ^[2]; Bajic, S J; Compton, R N ^[3]

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1. Foundation for Research, P.O. Box 1527, Heraklio Crete, 71110 (Greece) Foundation for Technology-Hellas, P.O. Box 1527, Heraklio Crete, 71110, (Greece)
2. Physics Department, University of Southern California, Los Angeles, California 90089-0484 (USA)
3. Chemical Physics Section Health and Safety Research Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831 (USA)

Collisional relaxation of the 6{ital s}(3/2){sub 1}{sup 0} and 6{ital s}{prime}(1/2){sub 1}{sup 0} {ital m{sub J}} levels of Xe has been investigated both experimentally and theoretically. Collisional disalignment and dephasing of the {ital m}{sub {ital J}} levels have been studied by measuring the pressure and laser intensity dependence of the ratio of the ionization from selectively excited {ital m}{sub {ital J}}=0 and {plus minus}1 sublevels in a three-photon resonant-ionization experiment via the 6{ital s} and 6{ital s}{prime} states of Xe. The selective ionization is achieved by a novel use of two counterpropagating laser beams having parallel and orthogonal polarization, respectively. The pressure dependence of the ionization ratio has been calculated by solving a system of rate equations derived from a full set of density-matrix equations pertaining to the particular experimental conditions. Collisional-relaxation cross sections of the investigated levels have been estimated by fitting the calculated results to the experimental data. The ionization ratio is found to be sensitive to both disalignment and dephasing of the {ital m}{sub {ital J}} levels.

• DOE Contract Number: FG03-87ER60504
• OSTI ID: 6850998
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 41:3; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BEAMS
COLLISIONS
DE-EXCITATION
DENSITY MATRIX
DOUBLE RESONANCE METHODS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUIDS
GASES
IONIZATION
MATRICES
MULTI-PHOTON PROCESSES
NONMETALS
PHOTOIONIZATION
POLARIZED BEAMS
RARE GASES
XENON