Infrared multiphoton energy deposition in chlorodifluoromethane

Energy absorption by CF2HCl from an intense CO2 laser pulse was measured as a function of the laser energy fluence, the temp., the pressure of CF2HCl, and the pressure of Ar bath gas. For collision-free multiphoton absorption, the av. no. of photons absorbed per mol. increases from 2 to nearly 12 when the fluence is increased from 1.6 to 10.9 J-cm-2 at 298 K. Compariosn of absorption and dissocn. data measured under identical conditions indicates relatively wide internal energy distributions produced by the multiphoton excitation. At 3 J-cm-2 the av. no. of photons absorbed per mol. increases with increasing temp. between 300 and 450 K, whereas in the same temp. range at 10.7 J-cm-2, a pronounced max. was found in the absorption near 370 K. In the presence of 1 atm of added Ar, an av. of as many as 100 photons per mol. of CF2HCl can be absorbed as compared to the 18 photons necessary for collisionless dissocn.


Published in:
Journal of Chemical Physics, 75, 7, 3371
Year:
1981
Keywords:
Note:
Copyright 2003 ACS
CAPLUS
AN 1981:559468
CAN 95:159468
73-6
Spectra by Absorption, Emission, Reflection, or Magnetic Resonance, and Other Optical Properties
74
Inst. Chim. Phys.,Ec. Polytech. Fed. Lausanne,Lausanne,Switz. FIELD URL:
Journal
JCPSA6
written in English.
Photon (absorption of many, by chlorodifluoromethane); Laser radiation (multiphoton absorption of, by chlorodifluoromethane); Energy level transition; Photolysis (multiphoton, of chlorodifluoromethane)
Laboratories:




 Record created 2011-02-01, last modified 2018-01-28


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