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Transient Effects in the Room‐Temperature F‐Colouring of NaCl Irradiated with X‐ or γ‐Rays
Author(s) -
Sánchez C.,
AgullóLópez F.
Publication year - 1968
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.19680290125
Subject(s) - transient (computer programming) , irradiation , activation energy , vacancy defect , kinetics , materials science , ion , crystal (programming language) , process (computing) , thermodynamics , analytical chemistry (journal) , chemistry , crystallography , physics , nuclear physics , computer science , chromatography , organic chemistry , quantum mechanics , programming language , operating system
In this paper a new transient effect in the room‐temperature F‐colouring of NaCl is presented which occurs whenever a X‐ or γ‐irradiation is resumed after an interruption time where in the crystal remains in the dark. A detailed study of the characteristics of the effect is made and a relatively simple theoretical model is proposed to account for them. Essentially, the model is based on the existence of a thermally activated process consisting of the removal of free anion vacancies. The data on transient colouring permit to investigate the kinetics of that vacancy process and determine its activation energy (0.39 eV).