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, D. Raybone, 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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