Semiclassical calculations of half-widths and line shifts for transitions in the 30012←00001 and 30013←00001 bands of CO2 II: Collisions with O2 and air

摘要: Abstract Calculations of the half-width, its temperature dependence, and line shift are made for rotational states J=0–120 two Fermi-tetrad bands (30012←00001 30013←00001) CO2 perturbed by N2. The calculations employ semi-classical complex Robert–Bonamy method with no ad hoc scaling, J-dependent or otherwise, an intermolecular potential (IP) comprised electrostatic part, atom–atom isotropic London dispersion part. averaging over impact parameter b relative speed v explicitly carried out. Many interesting features about as radiating molecule elucidated. Effects trajectory model, order expansion component potential, inclusion imaginary terms studied. It is shown that results very sensitive to potential. final IP parameters give demonstrate excellent agreement measurement three shape studied in this work.