Rotational excitation and de-excitation of CH+ molecules by 4He atoms

Details Rotational excitation and de-excitation of CH+ molecules by 4He atoms Rotational excitation and de-excitation of CH+ molecules by 4He atoms

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...511a..28t&link_type=abstract

Astronomy and Astrophysics, Volume 511, id.A28

Astronomy and Astrophysics

Astrophysics

3

Molecular Data, Molecular Processes, Ism: Molecules, Astrochemistry

Scientific paper

We present a quantum mechanical investigation of rotational energy transfer in cold collisions of CH+ with 4He atoms. We use a global 3D potential energy surface obtained using the reproducing Kernel Hilbert Space (RKHS) method. Rotational deactivation transition cross-sections are performed for collision energy ranging from 10-6 to 3000 cm-1 and the corresponding rotational deactivation and excitation rate coefficients are evaluated for the transitions of levels up to j = 5 and temperatures up to 500 K. We also discuss the validity of the rigid rotor approximation for this collision.

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