For the first time peculiarities of the formation of Dicke optical superradiance are studied experimentally and theoretically in a pyrene-doped biphenyl crystal under active phonon effect (the energy level is lAgJBzu; wavelength 373.93 nm; pyrene concentration 0.25 molyo; temperature 1.5 to 4.2 K). The possibilities of this phenomenon to obtain spectroscopic data are demonstrated. The pseudolocalized phonon lifetime tphon and the activation energy AE are estimated to AE = (7 3) cm-' and tphon = 2 to 20 ps by the temperature dependence of the superradiance intensity. Erstmalig wurden Besonderheiten der Bildung des optischen

No abstract

No abstract

No abstract