Počet záznamů: 1

Optimization of decay kinetics of YAG:Ce single crystal scintillators for S(T)EM electron detectors

  1. 1.
    0366953 - UPT-D 2012 RIV NL eng J - Článek v odborném periodiku
    Schauer, Petr
    Optimization of decay kinetics of YAG:Ce single crystal scintillators for S(T)EM electron detectors.
    Nuclear Instruments & Methods in Physics Research Section B. Roč. 269, č. 21 (2011), s. 2572-2577 ISSN 0168-583X
    Grant CEP: GA ČR GAP102/10/1410
    Výzkumný záměr: CEZ:AV0Z20650511
    Klíčová slova: scintillation detector * electron microscope * cathodoluminescence * YAG:Ce single crystal scintillator * decay time * afterglow * kinetic model * SEM * STEM
    Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika
    Impakt faktor: 1.211, rok: 2011

    To enhance the detective quantum efficiency (DQE) of scintillation electron detectors for scanning electron microscopes or scanning transmission electron microscopes (S(T)EM), the cathodoluminescence (CL) decay kinetics of YAG:Ce single crystal scintillators is studied in this paper. Some possibilities for reductions of decay time and afterglow of the mentioned scintillators are presented. The pulse mode utilizing a blanking system and 10 keV electrons for the excitation and a sampling oscilloscope for the CL detection were used for the measurement of decay characteristics. The CL decay characteristics of YAG:Ce single crystals of different Ce concentrations, pulled by the Czochralski method and cleaned and annealed under specific conditions, were measured in dependence on excitation pulse duration and on the specimen temperature. To interpret the presented results, a kinetic model of cathodoluminescence of the YAG:Ce single crystals was created.
    Trvalý link: http://hdl.handle.net/11104/0201766