https://doi.org/10.1140/epjd/e2008-00167-2
Rotational excitation of CH4 by He atoms
Department of Physics and Astronomy and the Center for
Simulational Physics, The University of Georgia, GA 30602-2451 Athens, USA
Corresponding author: a yang@physast.uga.edu
Received:
11
April
2008
Revised:
21
July
2008
Published online:
29
August
2008
Quantum close-coupling and coupled-state approximation scattering calculations for rotational energy transfer of rotationally excited CH4 due to collisions with He are presented for collision energies between 10-7 and 3000 cm-1 using the MP4 potential of Calderoni et al. [J. Chem. Phys. 121, 8261 (2004)]. State-to-state cross sections and rate coefficients from selected initial rotational states of CH4 in symmetries A, E, and F are studied from the ultra-cold to the thermal regime. Comparison of the cross sections with available theoretical results and experimental data show good agreement. Applications to astrophysics and cold laboratory environments are briefly addressed.
PACS: 34.50.-s – Scattering of atoms and molecules
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
