Collisional excitation of HCN - Hyperfine transitions

Details Collisional excitation of HCN - Hyperfine transitions Collisional excitation of HCN - Hyperfine transitions

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.211..257m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 211, Nov. 15, 1984, p. 257-266.

Astronomy and Astrophysics

Astronomy

10

Collision Rates, Hydrocyanic Acid, Hyperfine Structure, Molecular Collisions, Molecular Excitation, Helium Atoms, Nuclear Spin, Quantum Mechanics

Scientific paper

The coupled states method was used, together with an interaction potential calculated for the HCN-He system by Green and Thaddeus (1974), in order to evaluate rate coefficients for the rotational excitation of HCN with the inclusion of nuclear spin. Cross sections were evaluated over the 0-100/cm range of energies for all rotational levels, up to and including j = 5. Calculated values for the components of each j = 0 - j-prime transition were found to closely follow the ratios of the final state degeneracies at all energies, although this was not generally the case.

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