Premium
Off‐Centre Effects in the Triplet Relaxed Excited State of Ga + Centres in CsBr:Ga Crystal
Author(s) -
Kalder K.,
Korrovits V.,
Nagirnyi V.,
Stolovits A.,
Zazubovich S.,
Babin V.
Publication year - 1997
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 - 10.1002/1521-3951(199706)201:2<429::aid-pssb429>3.0.co;2-j
Subject(s) - metastability , excited state , tetragonal crystal system , singlet state , triplet state , ion , spectral line , crystal (programming language) , atomic physics , lattice (music) , emission spectrum , chemistry , kinetics , maxima and minima , molecular physics , crystallography , crystal structure , physics , mathematical analysis , mathematics , organic chemistry , quantum mechanics , astronomy , computer science , acoustics , programming language
Spectra, polarization and decay kinetics of the triplet and singlet emission of Ga + centres in CsBr:Ga crystals have been studied in the temperature range of 0.1 to 400 K. It has been found that the triplet A X and A T emission bands coincide. Two slow components have been observed in the decay kinetics of each emission at T < 1.5 K and explained by the tunnel splitting of the metastable minima of the corresponding triplet relaxed excited state. It points to the off‐centre displacement of a Ga + ion from a crystal lattice site both in the tetragonal (T) and in the trigonal (X) Jahn‐Teller minima.