The influence of the ortho:para-H2 ratio on molecular collisions in interstellar clouds.
Abstract
Hydrogen is the most abundant molecule in interstellar clouds and plays a determining role in reactive and non-reactive scattering processes. The two forms of hydrogen - ortho- and para-H2 - can behave differently in collisions with other atomic and molecular species. The ortho:para ratio generally differs from its value in thermal equilibrium. Techniques for deducing this ratio are discussed which depend on theoretical and experimental determinations of collision cross-sections.
- Publication:
-
Comments on Atomic and Molecular Physics
- Pub Date:
- February 1991
- Bibcode:
- 1991CoAMP..26...35F
- Keywords:
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- Interstellar Clouds: Molecular Processes;
- Interstellar Clouds: Atomic Processes