Rotational energy transfer within CH A2Δ(v = 0) and B2Σ-(v = 0) states by collisions with He, Ar, N2, CO, N2O, and CHBr3 using a time-resolved Fourier transform spectrometer
Journal
Journal of Chemical Physics
Journal Volume
112
Journal Issue
23
Pages
10204-10211
Date Issued
2000
Author(s)
Wang, C.-C.
Chen, Y.-P.
Chin, T.-L.
Huang, H.-Y.
KING-CHUEN LIN
Abstract
An alternative method to obtain the rotational energy transfer (RET) rate constant within the CH A and B states by using a time-resolved Fourier transform spectrometer is presented. The collision partners used are He, Ar, CO, N2, N2O, and CHBr3 for the B state, while He and Ar are for the A state. The RET collision within the B state is dominated by a long-range attractive interaction, resulting in the multiquantum change up to ΔN = ±3. The rate constants are on the order of 10-12-10-10 cm3 molecule-1 s-1, comparable to the gas kinetic. In general, the speed of rotational energy transfer depends on the strength of the long-range attractive interaction and the numbers of internal degrees of freedom provided by the colliders.
SDGs
Type
journal article