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Assignment of the Optical Absorption Bands in CsI:Tl and CsBr:Tl by Application of High Pressure
Author(s) -
Asami K.,
Naka T.,
Ishiguro M.
Publication year - 1981
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.2221040115
Subject(s) - halide , excited state , absorption (acoustics) , alkali metal , caesium , chemistry , wavelength , phosphor , absorption band , atomic physics , materials science , optics , optoelectronics , inorganic chemistry , physics , organic chemistry
Abstract The assignment of the absorption bands in cesium halide thallous phosphors (CsI:Tl and CsBr:Tl) is performed by making use of the phase transition from NaCl‐type to CsCl‐type under high pressures. It is concluded that the longest wavelength band corresponds to the A band in alkali halide thallous system and the origin of the next wavelength one is the A‐like transition, that is, the transition to the excited state similar to that in the case of the A band which has two relaxed excited states.