Hot Luminescence and Relaxation of Excited State in NaNO2

Abstract

Relaxation processes of the vibronic levels of 1 B 1 state in NaNO 2 have been studied by the measurement of hot luminescence (H.L.) in the crystal. Several weak lines have been detected at the energy positions where H.L. lines are expected to appear. These lines are identified as H.L. based on their dependences on the energy of exciting light. From the decay time of the ordinary luminescence (O.L.) of about 7 nsec and the intensity ratios of H.L. to O.L., the lifetimes of (1', 0') and (0', 1') vibronic levels are estimated to be about 1.5 and 5 psec, respectively.