Collisional excitation of thioformaldehyde and of Silylidene

For analysis of spectrum of a molecule in the interstellar medium, radiative and collisional transition probabilities for rotational transitions in the molecule are required. We have calculated collisional rate coefficients for rotational transitions in ortho and para thioformaldehyde (H2CS), and in...

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Bibliographic Details
Published in:Advances in space research 2015-01, Vol.55 (1), p.434-439
Main Authors: Sharma, M.K., Sharma, Monika, Verma, U.P., Chandra, Suresh
Format: Article
Language:English
Subjects:
Collisional rate coefficients
Collisions
Excitation
H2CS
H2CSi
Interstellar matter
ISM: molecules
Mathematical analysis
Rotational
Space research
Transition probabilities
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Summary:For analysis of spectrum of a molecule in the interstellar medium, radiative and collisional transition probabilities for rotational transitions in the molecule are required. We have calculated collisional rate coefficients for rotational transitions in ortho and para thioformaldehyde (H2CS), and in ortho and para Silylidene (H2CSi) due to collisions with He atom for kinetic temperatures 10, 20, 30, 40 and 50K, following the procedure discussed in our earlier work. The accuracy of collisional rate coefficients may be within a factor of 2.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2014.09.030