Modelling the Pressure Effect on the Multiphoton Absorption and Dissociation of CDF3. Collisional Energy Transfer

BEATRIZ M. TOSELLI; JUAN CARLOS FERRERO; STARICCO EDUARDO

AMER CHEMICAL SOC

Año: 1986 p. 4562 - 4562

simple model based on the solution of the master equation, but including rotational effects in the first discrete levels, hasbeen used to model the uL(@) and reaction probability results for CDF3 in a wide range of experimental conditions. Weinvestigated the role played by collisions in order to overcome restrictions to the absorption processes, which is a strikingfeature of small molecules. By solving the rate equations we have been able to obtain information about the rotational relaxationrate of CDF, by collisions with CDF3, CHF3, and Ar as well as information about the average energy transferred by collisionsbetween the different buffer gases and the vibrationally excited CDF,. For CDF, (CHF3) as collider the values determinedare k,,(CDF,-CDF,) = k,,,(CDF3-CHFJ = (3.0-6.0) X ns-' Torr-' and (AE)d = 3 kcal mol-', and for Ar as bathgas, k,,,(CDF,-Ar) = 6.7 X ns-' Torr-' and ( A E ) , < 0.7 kcal mol-'.