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Thermoluminescence and Phosphorescence of VUV‐ and X‐Irradiated CaO Monocrystals at Low Temperatures
Author(s) -
Dolgov S. A.,
Kärner T.,
Maaroos A.,
Savikiiina T. I.,
Vasilchenko E. A.
Publication year - 1994
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.2221860227
Subject(s) - thermoluminescence , phosphorescence , irradiation , materials science , spectral line , analytical chemistry (journal) , electron , excitation , quantum tunnelling , activation energy , atomic physics , chemistry , luminescence , optoelectronics , optics , fluorescence , physics , nuclear physics , chromatography , astronomy , quantum mechanics
Thermoluminescence (TL) of CaO and CaO‐Bi monocrystals VUV‐irradiated at 80 K or X‐irradiated at 4.2 K is reported. Varying the energy of VUV‐irradiation, the TL creation spectra (TLCS) of various peaks are derived. From the analysis of these spectra it is concluded that in the excitation spectrum of CaO indirect transitions may play an important role already from E exc = 6.5 eV. Long‐lived phosphorescence, as well as low‐temperature TL peaks at 20, 37, and ≈ 50 K of X‐irradiated CaO and CaO‐Bi monocrystals at LHeT are observed. The observed phosphorescence is interpreted as a tunneling recombination between holes and electrons, trapped, respectively, by cation vacancies (V centers) and unidentified donor centers, thermal destruction of which takes place at ≈50 K.