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Title: Experimental and theoretical studies of molecular transition moments
Author: Chalkley, Stephen Wilfred
ISNI:       0000 0001 3526 1030
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 1980
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Firstly, Stark effects have been observed for individual lines in the excitation spectrum of the NHD radical, recorded in the visible region with a tunable dye laser. Individual MT components have been resolved with Doppler limited resolution. The results are interpreted in terms of an interaction between the applied electric field and a ground state dipole moment determined to be 1.82±.05D'and a dipole moment in the (0,9,0) level of the A'A' state determined to be 0.19±.06D. Secondly, a simple perturbation treatment is used to reduce the number of independent transition moments (which may, in principle, be many) necessary to describe the intensity distribution of intercombination transitions (involving AS=l) in diatomic molecules. It is demonstrated that, in general, the number of independent transition moments can always be reduced to three (four for if - II transitions). The treatment is valid for weak spin-orbit interaction between electronic states, and yields formulae, by which any intercombination transition moment can be expressed in terms of one of three parameters - u//, ull,or h12. Several examples of the application of these formulae is given.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Atomic physics & molecular physics