6 June 1993 Radiative lifetime and quenching constants of the PF(A3II) state
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Proceedings Volume 1871, Intense Laser Beams and Applications; (1993) https://doi.org/10.1117/12.145238
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
The radiative lifetime and the quenching rate constants of the PF(A3$PI0,1,2) state have been measured using a microwave discharge to generate PF(X3(Sigma) -) in a flow reactor incorporating laser-induced fluorescence. A radiative lifetime of 4.2 +/- 0.2 microsecond(s) has been determined for a 300 K Boltzmann distribution of rotational and spin- orbit states of PF(A,v' equals 0). The two-body quenching rate constants for PF(A3$PI) by diatomic and polyatomic molecules and rare gases were determined at 300 K from the pressure dependence of the first-order decay constants. Electronic quenching by He, Ar, CF4 and SF6 is inefficient and upper limits to these deactivation rate constants are 2 - 4 X 10-14 cm3 molecule-1 s-1. Except for highly fluorinated molecules, the quenching constants for most molecules are in the range of 0.05 - 4.0 X 10-10 cm3 molecule-1 s-1. The available data suggest that the PF(A3$PI0,1,2) state has some promise as a potential UV laser candidate, providing that an efficient excitation method can be discovered.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jie Xu, Jie Xu, D. Raybone, D. Raybone, Donald W. Setser, Donald W. Setser, } "Radiative lifetime and quenching constants of the PF(A3II) state", Proc. SPIE 1871, Intense Laser Beams and Applications, (6 June 1993); doi: 10.1117/12.145238; https://doi.org/10.1117/12.145238
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