Lifetime and collisional quenching measurements of XeF*(B) by photolysis of XeF2.
By photolyzing XeF 2 using ArCl* 175-nm radiation, the spontaneous radiative lifetime of the XeF(B --> X) band has been measured to be 14.25 + 0.2 nsec. Also, the rates of two-body collisional deactivation of the XeF(B) state by Ne, Ar, and XeF 2 have been determined to be 7.7 X 10(-13) cm3 sec(-1), 4.9 X 10(-12) cm3 sec(-1), and 2.6 X 10(-10) cm3 sec(-1), respectively. A three-body quenching rate of 7.2 X 10(-32) cm6 sec(-1) was found for Ar. The large two- and three-body quenching rates of XeF* by Ar suggest that Ne may be preferable to Ar as a diluent in high-pressure XeF (350-nm) laser mixtures.
Eden
J G
JG
Laser Physics Branch, Optical Sciences Division, Naval Research Laboratory, Washington, DC 20375, USA.
Waynant
R W
RW