EXACT SOLUTIONS TO A CLASS OF JAHN-TELLER SYSTEMS

Generalisations of the two apparently rational eigenvalues found by Thorson and Moffitt for the Jahn-Teller system Gamma 8(X) tau 2 are studied. Equations of finite order are established for determining the strength D of the Jahn-Teller interaction of which an eigenvalue lies on a baseline. (A baseline is the line that constitutes the asymptote of a sequence of rotational levels that come into existence as D tends to infinity.) The analysis is extended to the system E(X) epsilon and is illustrated by a number of special examples.