The rotational excitation of SiS by para- and ortho-H2

Details The rotational excitation of SiS by para- and ortho-H2 The rotational excitation of SiS by para- and ortho-H2

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.390..239k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 390, Issue 1, pp. 239-244.

Astronomy and Astrophysics

Astronomy

14

Molecular Data, Molecular Processes, Scattering

Scientific paper

Over the next few years, the Atacama Large Millimeter Array (ALMA) and Herschel missions will perform high spatial and spectral resolution studies at infrared and submillimetre wavelengths. Modelling of molecular emission requires excitation calculations using radiative as well as collisional rates with the most abundant species. The present paper focuses on the calculation of rate coefficients among the first 41 rotational levels of the silicon monosulfide (SiS) molecule in its ground vibrational state in collision with para- and ortho-H2. Dynamical calculations of pure rotational (de)excitation of SiS by para- and ortho-H2 were performed within the coupled-states approximation using the recently published highly correlated ab initio potential energy surface. Collisional cross-sections among the first 41 rotational levels of SiS are calculated for kinetic energies up to 2500cm-1. State to state rate coefficients are calculated for temperatures ranging from 5 up to 300K. SiS rate coefficients are dependent on the initial rotational level of the H2 molecule. The rate coefficients for collisions with H2(j = 0) are significantly lower than the rate coefficients for collisions with H2(j = 1) and H2(j = 2). The strongest collision-induced rotational SiS transitions are the transitions with Δj = 2 for collisions with H2(j = 0) and the transitions with Δj = 1 for collisions with H2(j = 1) and H2(j = 2).

Affiliated with

Also associated with

No associations

Rating

The rotational excitation of SiS by para- and ortho-H2 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 The rotational excitation of SiS by para- and ortho-H2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The rotational excitation of SiS by para- and ortho-H2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-856799