Br2 in an ar matrix: an example of complete damping of the resonance raman scattering amplitude in the discrete resonance limit

Raman scattering and relaxed fluorescence is observed upon cw laser excitation resonant with the lower vibrational manifold of the X( 1 Σ o+u ) → B( 3 Π o+u ) transition of matrix isolated Br 2 at liquid He temperatures. The excitation profile of the relaxed fluorescence maps out the resonances, but neither detectable enhancement of Raman scattering nor resonance fluorescence is observed.