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Photostimulated low‐temperature recombination luminescence in γ‐irradiated KCl:Eu 2+ crystals
Author(s) -
Opyrchal H.,
Nierzewski K. D.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220950128
Subject(s) - thermoluminescence , luminescence , excited state , irradiation , atmospheric temperature range , ion , recombination , atomic physics , materials science , analytical chemistry (journal) , chemistry , physics , optoelectronics , nuclear physics , biochemistry , organic chemistry , chromatography , meteorology , gene
A strong, few seconds lasting post‐luminescence due to Eu 2+ emission is excited at 15 K by light flashes in KCl:Eu 2+ crystals coloured by γ‐rays at RT. Within the range of 15 to 70 K the intensity of post‐luminescence varies in inverse proportion to the time and does not depend on temperature. Thermoluminescence glow curves photostimulated at 15 K point to the existence of several glow peaks most of which are due to the thermal activation of trapped‐hole centres of H‐ and V k ‐type. The plausible mechanisms responsible both for post‐luminescence and thermoluminescence as well as the role of Eu 2+ ions are discussed.