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X‐ray induced luminescence in NaCl: Ca ++
Author(s) -
Aguilar M.,
Jaque F.,
AgullóLópez F.
Publication year - 1977
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.2220840223
Subject(s) - luminescence , excited state , doping , analytical chemistry (journal) , quenching (fluorescence) , liquid nitrogen , materials science , fluorescence , crystal (programming language) , x ray , nitrogen , chemistry , atomic physics , optics , physics , optoelectronics , organic chemistry , chromatography , computer science , programming language
An investigation of the X‐ray induced luminescence in pure and Ca‐doped NaCl crystals is made in the range from liquid nitrogen temperature (LNT) to 200 K. At LNT a band at 415 nm is observed in the doped samples in addition to the typical σ and π emissions. It does not appear to be a perturbed “pure crystal” emission but is associted to a different intrinsic transition of the V K + e system. At higher temperatures the LNT emissions become quenched and two bands at 310 and 330 nm are observed in pure as well as doped crystals. They markedly decrease on increasing Ca‐concentration and on quenching the doped samples. These bands appear to involve electron transitions to excited V K centres.