incorporate recent OI and CI collision rates

[gary]

update H - CI&OI rates to The Astrophysical Journal, 654:1171Y1174, 2007 January 10

FINE-STRUCTURE EXCITATION OF O i AND C i BY IMPACT WITH ATOMIC HYDROGEN E. Abrahamsson and R. V. Krems Department of Chemistry, University of British Columbia, Vancouver, BC, Canada; rkrems@… and A. Dalgarno ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA Received 2006 July 6; accepted 2006 September 20 ABSTRACT Using accurate interaction potentials, we perform refined calculations of rate coefficients for the fine-structure excitations in collisions of O( 3P) andC(3P) with atomic hydrogen. The results are presented in the form of analytical functions approximating the rate coefficients over a wide range of temperatures. We examine the sensitivity of the collision dynamics to variations of the interaction potentials and the couplings to electronically excited states.