Excitation-transfer collisions in cesium vapor: CS(5d (5/2)) + CS(6s (1/2)) yields CS(5d (3/2)) + CS(6s (1/2))

Technical Report · Tue Nov 01 00:00:00 EST 1988

OSTI ID:6198713

Keramati, B; Masters, M; Huennekens, J

The excitation-transfer collision Cs(5D5/2) + Cs(6S) yields CS(5D3/2) + Cs(6S) was studied. The upper 5D5/2 state was excited by a c-w dye laser tuned to the one photon, quadrupole-allowed 6S yields 5D5/2 transition. Since the direct 5D yields 6P fluorescence could not be detected with our apparatus we monitored instead the cascade 6P yields 6S fluorescence. The ratio of 6P 1/2 to 6P3/2 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 6P3/2 state, and the same fluorescence ratio monitored. The 5D mixing cross section obtained, 70 A, is significantly larger than previous indirect determinations.

• Research Organization: Lehigh Univ., Bethlehem, PA (USA). Dept. of Physics
• OSTI ID: 6198713
• Report Number(s): AD-A-204040/0/XAB
• Resource Relation: Other Information: Pub. in Physical Review A, Vol. 38, No. 9, 4518-4526(1 Nov 1988)
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CESIUM
MOLECULE-MOLECULE COLLISIONS
EXCITATION
DYE LASERS
ENERGY LEVELS
ENERGY TRANSFER
FLUORESCENCE
MIXING
PHOTONS
SEMICONDUCTOR LASERS
SPECTROMETERS
VAPORS
ALKALI METALS
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
LASERS
LIQUID LASERS
LUMINESCENCE
MASSLESS PARTICLES
MEASURING INSTRUMENTS
METALS
MOLECULE COLLISIONS
SEMICONDUCTOR DEVICES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena