O2−O2 and O2−N2 collision-induced absorption mechanisms unravelled

Temperature dependences of mechanisms responsible for the water-vapor continuum absorption. II. Dimers and collision-induced absorption.

We investigated the magnitude and temperature dependence (T dependence) of the dimer absorption in the region of 0-600 cm(-1) and the collision-induced absorption (CIA) in the region of 0-1150 cm(-1). Together with our previous study of the self water-vapor continuum contributions resulting from far-wing line shapes of the allowed H(2)O lines in the infrared window between 800 and 1150 cm(-1), ...

Collision-induced dissociation mechanisms of [Li(uracil)]+.

The collision-induced dissociation (CID) of the [Li(uracil)](+) complex with Xe is studied by means of quasi-classical trajectory calculations. The potential energy surface is obtained "on the fly" from AM1 semiempirical calculations, supplemented with two-body analytical potentials to model the intermolecular interactions. The simulations show that Li(+) production is the primary channel, in a...

Collision induced absorption in CO2 at 0.091 cm-1

2014 Collision induced microwave absorption has been studied at 0.091 cm-1 and 293 K up to 60 amagat density. Expressing the dielectric loss 03B5" in the form 03B5" = A03BD03C12(1 Bp), where 03BD is the frequency in cm-1 and p is the density, we find A = 0.22 10-7 (cm.amagat-2) and B = 0.008 2 (amagat-1). As a result the molecular quadrupole moment of CO2 is calculated to be 5.6 10-26 (esu). J....

Collision-induced Absorption in Ö Diatomic Molecule/rare-gas Mixtures

Collision-induced absorption with exchange effects and anisotropic interactions: theory and application to H2 - H2.

We discuss three quantum mechanical formalisms for calculating collision-induced absorption spectra. First, we revisit the established theory of collision-induced absorption, assuming distinguishable molecules which interact isotropically. Then, the theory is rederived incorporating exchange effects between indistinguishable molecules. It is shown that the spectrum can no longer be written as a...