Single vibronic level fluorescence. III. Fluorescence yields from three vibronic levels in the B-1(2u) state of benzene

Absolute quantum yields of fluorescence have been determined for each of three specific vibronic levels id isolated B-1(2u) benzene molecules. The yields are 0.22, 0.27 and 0.25 for the zero point level and for the state nu'(6) and (nu'(6) + nu'(1)) respectively. The methods used to derive these yields are described.