On the Zeeman effect of ^{2}Π states in diatomic molecules
Abstract
The theory of the Zeeman effect in ^{2}Π states of diatomic molecules is reconsidered. Second order terms due to the interaction with ^{2}∆ states, which were left out in a previous investigation, are now included. The total correlation between the spinrotation coupling constant and the centrifugal distortion in the spinorbit coupling renders the fitted molecular g factors somewhat ambiguous. This problem is handled by a transformation of the basis for the Hamiltonian matrix. The theoretical results are exemplified for the ^{2}Π ground state of OH for which EPR data are available for both the ^{2}Π_{{3}/{2}} and ^{2}Π_{{1}/{2}} substates. A combination of ab initio predictions and fitted values of the g factors finally yields new information concerning the separate contributions from ^{2}Σ ^{+}, ^{2}Σ ^{}, and ^{2}∆ states to the contamination of the ^{2}Π ground state in OH.
 Publication:

Journal of Molecular Spectroscopy
 Pub Date:
 August 1979
 DOI:
 10.1016/00222852(79)901012
 Bibcode:
 1979JMoSp..77..195V