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Absorption and Emission Spectra of NaCl:Ag Crystals Containing Oxygen and Calcium Impurities
Author(s) -
Kaiser R.,
Ludewig K.,
Möller W.
Publication year - 1971
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.2220460219
Subject(s) - impurity , oxygen , calcium , absorption (acoustics) , absorption spectroscopy , neutron activation analysis , analytical chemistry (journal) , emission spectrum , inorganic chemistry , chemistry , doping , materials science , spectral line , nuclear chemistry , radiochemistry , optics , metallurgy , chromatography , physics , organic chemistry , astronomy , composite material , optoelectronics
Optical absorption and emission of NaCl crystals doped with different silver concentrations and containing various contaminations of calcium and oxygen were investigated. The amounts of silver, calcium, and oxygen were determined by neutron activation analysis. Two absorption bands at 250 and 260 nm show the same temperature dependence between 80 and 300 °K as the F centre absorption in NaCl. Silver and oxygen are necessary for the centre, but our data provide no conclusive evidence that calcium is involved. The emission spectrum consists of three distinct bands at 350, 380, and 450 nm, which are interpreted.