Collisional Relaxation of Highly Vibrationally Excited CF2O Prepared with Different Initial Energies ans Distribution Functions

E.A. CORONADO

JOURNAL OF CHEMICAL PHYSICS

AMER INST PHYSICS

Lugar: Melville; Año: 1999 vol. 110 p. 1942 - 1942

0021-9606

he collisional relaxation of highly vibrationally excited CF2O* molecules prepared by infrared laser multiphoton absorption is compared with the results obtained when CF2O* is generated as a product of the reactions of CF3 and CF2Cl radicals with NO2. The three methods produce molecules with probably different energy distributions and also different average excitation energies 〈E〉. Thus, IR laser excitation results in a bimodal distribution, with average excitation energies in the range 3 000?20 000 cm−1, while the chemical reactions of CF3 and CF2Cl radicals produce CF2O* with a undetermined level of vibrational excitation that depends on the specific energy change of the process. Irrespective of the method of preparation, the same exponential decays are obtained for the each of various colliders studied (Ar, N2, NO2, and CF2O). It is shown that under these conditions, the observed bulk average energy transferred per collision, ⟨⟨ΔE&