Collision-induced absorption in the fundamental of

Collision-Induced Absorption in the Region of the O2 Fundamental: Bandshapes and Dimeric Features

“…A new model was suggested recently by Moreau et al (9,10). The authors claim now that these are metastable dimers which are responsible for the formation of ripples.…”

“…Although no explicit theory was suggested in (30), this idea met some continuation in the very recent publications by Moreau et al (9,10), as we shall see.…”

“…According to Stogryn and Hirschfelder (32) the ratio of the metastable to bound dimer mole fractions, x m /x b , amounts to about 0.3 in room-temperature oxygen. Consequently either statistical weights from (12) or the spectra of only shape resonances taken from (31) are not applicable to model ripples in the oxygen fundamental as is suggested in (9,10). Furthermore, there are no arguments as to why the rovibrational lines of metastable dimers should surround each oxygen quadrupole rovibrational line.…”

Theoretical Study of the Collision-Induced Double Transition CO2 (ν3 = 1) + N2 (ν1 = 1) ← CO2 (ν3 = 0) + N2 (ν1 = 0) at 296 K

“…However, a great deal of progress (1-4) has been made toward the theoretical determination of these spectra. In particular, several studies have been carried out on pairs containing the N 2 and O 2 molecules (2)(3)(4). In these cases, there is a weak continuum-type absorption due to transient dipoles that are induced during binary collisions (in particular, quadrupole-and hexadecapole-induced dipoles).…”

Theoretical Study of Collision-Induced Double Transitions in CO2-X2 (X2 = H2, N2, and O2) Pairs

“…There are errors inherent in neglecting the anisotropic nature of the interaction potential. However, in order to utilize the theory as presented here, and as utilized in other determinations of collision-induced absorption (3)(4)(5)10), where the line contributions are additive, this approximation must be made.…”