The origin of hyperfine structure in excited electronic states of NO"2

The analysis of measured hyperfine splittings in the ^2B"2 <- X^2A"1 spectrum of NO"2 shows that the major cause of the observed hfs splittings in the excited ^2B"2 state is vibronic coupling between a single level of the ^2B"2 state and many high lying vibrational levels...
Ausführliche Beschreibung

The analysis of measured hyperfine splittings in the ^2B"2 <- X^2A"1 spectrum of NO"2 shows that the major cause of the observed hfs splittings in the excited ^2B"2 state is vibronic coupling between a single level of the ^2B"2 state and many high lying vibrational levels of the X^2A"1 ground state. Only a minor part of the hfs splitting may be due to spin polarization of the core. These results agree with the simple MO picture of NO"2 which predicts no Fermi interaction type hfs in the pure ^2B"2 state. Ausführliche Beschreibung