The Magnetic Predissociation of the B3Π0+u State of the Iodine Molecule

It is shown that the predissociation of I2 excited to the B3Π0+u state can occur through the coupling with the 24311Πu state by gyroscopic and Zeeman interactions. The interaction matrix elements between the B3Π0+u and 24311Πu states are shown to be nonzero, for the 24311Πu state is mixed significantly with the 24313Π1u state by the spin-orbit interaction. The v, J dependence of the magnetic-quenching ratios of the B3Π0+u−X1Σ+g fluorescence intensity has been measured and analyzed. The rate constants of the magnetic predissociation in the B3Π0+u state have also been evaluated. The magnetic-field dependence of the hyperfine structure has been measured by means of the Doppler-free intermodulated fluorescence method.