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Optical Properties and Reorientation of M Centers in NaF
Author(s) -
Collins W. C.,
Schneider I.
Publication year - 1972
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.2220510236
Subject(s) - lithium (medication) , absorption (acoustics) , ionization , center (category theory) , f center , doping , materials science , atomic physics , analytical chemistry (journal) , ion , chemistry , crystallography , optoelectronics , physics , nuclear physics , irradiation , medicine , chromatography , endocrinology , organic chemistry , composite material
The reorientation efficiency of M centers in NaF is found to be proportional to the M + concentration, suggesting that M centers reorient via an M + mechanism, as in KCl. In this mechanism light is first absorbed in the higher transitions of the M centers causing them to ionize, and then in the higher transitions of the M + centers causing them to reorient. The higher transitions of both the M and the M + center are identified. In addition, a new absorption band at 516 nm giving rise to emission at 680 nm, seen in lithium‐doped samples, is tentatively identified as due to the lithium M A center.
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