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Radiation‐Induced Emission of F 2 Centres in KCl
Author(s) -
Chandratillake M. R.,
Newton G. W. A.,
Robinson V. J.,
Rodgers M. A. J.
Publication year - 1980
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.2221020221
Subject(s) - irradiation , emission spectrum , excitation , atomic physics , radiation , electron , materials science , electron excitation , spectral line , physics , optics , nuclear physics , astronomy , quantum mechanics
An emission has been observed in KCl single crystals subjected to 12 MeV electron pulses. The emission spectrum peaks at 1200 nm (1.03 eV) and has a temperature‐independent lifetime of 29.7 ns up to room temperature. Experiments with crystals previously irradiated to produce F and F 2 centres showed that the emission mainly arose from direct excitation by the electron pulse of previously existing F 2 centres. The lifetime data, but not the spectrum, are in good agreement with published data.