Rotational excitation of CO by collisions with He, H, and H_{2} under conditions in interstellar clouds.
Abstract
Cross sections for rotational excitation of small molecules by lowenergy collisions with helium and hydrogen can currently be obtained via accurate numerical solution of the quantum equations that describe both intermolecular forces and collision dynamics. The relevant methods are discussed in some detail and applied to compute excitation rates for carbon monoxide. These calculations also predict collisioninduced spectral pressurebroadening constants which are in excellent agreement with available experimental data.
 Publication:

The Astrophysical Journal
 Pub Date:
 May 1976
 DOI:
 10.1086/154333
 Bibcode:
 1976ApJ...205..766G
 Keywords:

 Carbon Monoxide;
 Cloud Physics;
 Interstellar Gas;
 Molecular Excitation;
 Scattering Cross Sections;
 Interstellar Matter;
 Pressure Broadening;
 Quantum Theory;
 S Matrix Theory;
 Velocity Distribution;
 Astrophysics