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Luminescence et transition non radiative 3 T 1u → 3 A 1u dans le luminophore BaS:Bi 3+
Author(s) -
Asano Par S.,
Nakao Y.,
Yamashita N.,
Matsuyama I.
Publication year - 1986
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.2221330139
Subject(s) - spectral line , excitation , atomic physics , emission spectrum , luminescence , luminophore , phosphorescence , phosphor , analytical chemistry (journal) , physics , chemistry , fluorescence , optics , nuclear physics , chromatography , quantum mechanics , astronomy
Emission and excitation spectra of BaS:Bi 3+ phosphors are measured at 300, 80, and 6 K. I n the excitation spectra the A and C excitation bands are observed. In the emission spectra only one band is observed which is assigned to the transition 3 A 1u → 1 A 1g on the basis of the measurement of the time‐resolved emission spectra and the decay constant of the phosphorescence. The diffused reflection spectra and the magnetic effect on the phonon structure of the emission band are also measured at 80 and 4.2 K, respectively. The former is compared with the excitation spectra. The reason why the emission band 3 T 1u → 1 A 1g cannot be observed at low temperatures is explained by the fact that the probability of the tunnel effect 3 T 1u → 3 A 1u is larger than that of the luminescent transition 3 T 1u → 1 A 1g .