The spectroscopic investigation of the fluorescence decay time of the anthracene crystal

Using single-photon counting technique measurements of fluorescence decay curves of anthracene crystals have been performed at room and 4.2°K temperatures. Different lifetimes have been found in different emission lines at 4.2°K. The fluorescence rise in some emission lines of intrinsic luminescence has been interpreted as a result of two-step mechanism of excitonic fluorescence of the anthracene crystal.