Abstract
The analysis of data on collisional transfer of rotational energy obtained by the technique of steady state four-level microwave double resonance is reviewed, with emphasis on the roles of the spatial degeneracies of the levels and the M dependence of their populations. Exact expressions are given for the collisional transfer signal in a general four-level system, with the level degeneracies included rigorously, and with M dependent and M independent contributions formally separated. The possible effects of the M dependence are illustrated for several test systems of CH3OH, with the use of a simplified first-order dipolar model for the collisional rate constants. Collisional transfer signals calculated with this model for a number of CH3OH systems are in reasonable relative agreement with observed values, but in poor absolute agreement. It is suggested that the latter feature may be due to neglect of higher-order transitions in the simple dipolar model.
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 callDisclaimer: 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.
