Excitation-transfer collisions in cesium vapor: Cs(5D/sub 5/2/)+Cs(6S/sub 1/2/). -->. Cs (5D/sub 3/2/)+ Cs(6S/sub 1/2/)

Journal Article · Tue Nov 01 00:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.4518· OSTI ID:7087468

Keramati, B; Masters, M; Huennekens, J

We report an experimental investigation of the excitation-transfer collision Cs(5D/sub 5/2/)+Cs(6S)..-->..CS ((5D/sub 3/2/)+Cs(6S). The upper 5D/sub 5/2/ state was excited by a cw dye laser tuned to the one-photon, quadrupole-allowed 6S..-->..5D/sub 5/2/ transition. Since the direct 5D..-->..6P fluorescence could not be detected with our apparatus, we monitored instead the cascade 6P..-->..6S fluorescence. The ratio of 6P/sub 1/2/ to 6P/sub 3/2/ fluorescence contains information on the collisional mixing that takes place in the 5D levels but also includes a significant contribution from mixing in the 6P levels. This latter contribution could effectively be subtracted out using the results of a second experiment in which a tunable cw diode laser was used to pump the 6P/sub 3/2/ state, and the same fluorescence ratio monitored. The 5D mixing cross section we obtain, 70 A/sup 2/, is significantly larger than previous indirect determinations.

• Research Organization: Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015
• OSTI ID: 7087468
• Journal Information: Phys. Rev. A; (United States), Vol. 38:9
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CESIUM
ATOM-ATOM COLLISIONS
CONFIGURATION MIXING
CROSS SECTIONS
EXCITED STATES
D STATES
DYE LASERS
ENERGY TRANSFER
FINE STRUCTURE
FLUORESCENCE
MEASURING METHODS
OPTICAL PUMPING
S STATES
TUNING
VAPORS
ALKALI METALS
ATOM COLLISIONS
COLLISIONS
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
INTERACTIONS
LASERS
LIQUID LASERS
LUMINESCENCE
METALS
PUMPING
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena