Abstract
An analysis is presented of the range of validity of the approximations currently used to calculate cross sections for fine-structure transitions at thermal energies. The particular example considered is the 2P1/2-2P3/2 transition in C+-H collisions. For a given set of interaction potentials of CH+, the full quantum-mechanical close-coupling method is used to provide a reference for comparison with a number of approximate dynamical models-semiclassical sudden approximation, quantal elastic and Omega -conserving methods. All of the dynamical models examined proved to be very satisfactory. On the other hand, the calculated cross sections are sensitive to the interaction potentials, especially for intermediate and long internuclear distances where the presently available data are not sufficiently reliable; errors in the calculated cross sections may attain 40%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics B: Atomic and Molecular Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
