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Thermoluminescence and Thermoluminescence Spectra of Calcium Fluoride Crystals Irradiated by X‐Rays
Author(s) -
Ratnam V. V.,
Bose H. N.
Publication year - 1966
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.19660150130
Subject(s) - thermoluminescence , irradiation , saturation (graph theory) , analytical chemistry (journal) , ion , fluorine , spectral line , materials science , crystal (programming language) , radiochemistry , chemistry , physics , mathematics , organic chemistry , chromatography , combinatorics , astronomy , computer science , nuclear physics , metallurgy , programming language
The glow curve pattern obtained for CaF 2 crystals irradiated by X‐rays at room temperature is markedly affected by even a small rise (say 30 °C) in the temperature of irradiation. This is presumably due to the neutral fluorine atoms which are produced by the holes trapped by the fluorine ions during X‐ray irradiation and which, at elevated temperatures of irradiation, form molecular complexes or diffuse out of the crystal. The spectral composition of the thermoluminescence obtained with samples irradiated at room temperature is similar for the first three glow peaks, except for minor changes in the relative intensities of the emission peaks; for the fourth glow peak however it is markedly different. Further, the first three glow peaks attain saturation with X‐ray dose similar to the colour bands, but no such tendency is observed for the fourth glow peak. These results indicate that the traps and emitting centres responsible for the first three glow peaks are different from those of the fourth glow peak.