Kinetic studies for XeF and KrF lasers. Quarterly research and development report No. 3

Technical Report · Wed Sep 14 04:00:00 EDT 1977

OSTI ID:5340030

Fisher, C H

The goal of this program is to determine the radiative life-time and the collisional quenching rate coefficients for the XeF and KrF upper laser levels using a state selective, laser excited fluorescence technique. During this reporting period, we have determined the XeF(B1/2 radiative lifetime by monitoring the decay of the 353 nm XeF(B1/2 yield X) fluorescence as a function of pressure. Preliminary collisional quenching rate constants have been determined for He, Xe, and F2 from the variation of the fluorescence decay time constant as a function of partial pressure of the collision partner. Collisional quenching by Ar was investigated; however, no bimolecular rate constant was determined because of nonexponential decay of the XeF(B yield X) emission in the presence of Ar. This behavior suggests collisional coupling to some other excited state, most likely the XeF(C3/2) state. Bimolecular collisional quenching rate coefficients by Ne and NF3 remain to be determined during the next reporting period. In addition, termolecular quenching by He, Ne, and Ar will be investigated by increasing the partial pressures of these constituents to the 1 to 3 atm range. Collisional coupling between the B1/2 and C3/2 states will also be investigated by looking for fluorescence at 460 nm on the XeF(C yield X) band.

• Research Organization: Mathematical Sciences Northwest, Inc., Bellevue, WA (USA)
• OSTI ID: 5340030
• Report Number(s): AD-A-107992/0; MSNW-1062
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CHEMICAL LASERS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUORESCENCE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
KINETICS
KRYPTON COMPOUNDS
KRYPTON FLUORIDES
LASERS
LIFETIME
LUMINESCENCE
RARE GAS COMPOUNDS
REACTION KINETICS
XENON COMPOUNDS
XENON FLUORIDES