caa a22 4500 477060455 CHVBK 20180405111358.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF02436153 doi (NATIONALLICENCE)springer-10.1007/BF02436153 Kinetics of nonequilibrium processes excited in broad-band dielectrics by synchrotron radiation [Elektronische Daten] [V. Pustovarov, B. Shul'gin, É. Zinin, A. Kuznetsov] Luminescence spectroscopy with subnanosecond time resolution is used to study features of nonequilibrium processes excited in several broad-zone dielectrics (mainly inorganic scintillators) by pulses of synchrotron radiation (SR). When excitation density exceeds a certain level, which is different for each material, there is an abrupt change in the kinetics of relaxation of the nonequilibrium states. This change is accompanied by nonuniform broadening or shortwave shifting of the luminescence spectrum and a drop in quantum light yield. The decay time for natural luminescence decreases by 1-3 orders, to nanoseconds, and is independent of temperature within the range 80-450 K. The build-up stage disappears in the kinetics of luminescence of Ce3+-centers and decay time is reduced by a factor of 2-4. Density effects are found to be independent of the conditions under which the material is exposed to SR. A model is proposed in which density effects are related to nonradiative energy transfer from the upper excited states of the luminescence centers to external quenching centers. The contribution of the space charge induced by SR is also examined. Plenum Publishing Corporation, 1997 Pustovarov V. aut Shul'gin B. aut Zinin É. aut Kuznetsov A. aut Russian Physics Journal Kluwer Academic Publishers-Consultants Bureau 39/11(1996-11-01), 1102-1113 1064-8887 39:11<1102 1996 39 11182 https://doi.org/10.1007/BF02436153 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02436153 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pustovarov V. aut NATIONALLICENCE 700 1- Shul'gin B. aut NATIONALLICENCE 700 1- Zinin É. aut NATIONALLICENCE 700 1- Kuznetsov A. aut NATIONALLICENCE 773 0- Russian Physics Journal Kluwer Academic Publishers-Consultants Bureau 39/11(1996-11-01), 1102-1113 1064-8887 39:11<1102 1996 39 11182 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer