Rotationally and torsionally inelastic scattering of methanol on helium

Details Rotationally and torsionally inelastic scattering of methanol on helium Rotationally and torsionally inelastic scattering of methanol on helium

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.411.2093r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 411, Issue 3, pp. 2093-2098.

Astronomy and Astrophysics

Astronomy

2

Molecular Data, Molecular Processes, Ism: Molecules, Radio Lines: Ism

Scientific paper

Cross-sections and rate coefficients have been computed for rotationally and torsionally inelastic transitions between levels of the torsional manifolds ν= 0, 1 and 2 of methanol; the collision partner was the helium atom. We find the torsional inelasticity to be most pronounced for transitions between the excited states, ν= 1 and 2. The torsionally inelastic cross-sections are smaller, on average, than the cross-sections for pure rotationally inelastic transitions, by typically an order of magnitude. We compared cross-sections calculated using the full CH3OH-He interaction potential, which is a function of the torsion angle, with the cross-sections computed for the staggered conformation, i.e. for a fixed value of the torsion angle. The agreement between these two sets of results improves with increasing magnitude of the cross-section. Accordingly, the use of previous results, for the rotational excitation of methanol by He and by H2, obtained for the staggered conformation, should not compromise the analysis of observations of methanol in the interstellar medium.

Affiliated with

Also associated with

No associations

Rating

Rotationally and torsionally inelastic scattering of methanol on helium does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Rotationally and torsionally inelastic scattering of methanol on helium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotationally and torsionally inelastic scattering of methanol on helium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1398579