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Luminescent properties of CsI single crystals grown from the melt treated with EuI 2
Author(s) -
Cherginets V. L.,
Rebrova T. P.,
Datsko Yu. N.,
Goncharenko V. F.,
Kosinov N. N.,
Yavetsky R. P.,
Pedash V. Yu.
Publication year - 2012
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201200040
Subject(s) - radioluminescence , scintillation , analytical chemistry (journal) , luminescence , chemistry , oxygen , intensity (physics) , spectral line , materials science , optics , physics , optoelectronics , organic chemistry , chromatography , astronomy , detector
CsI single crystals treated with EuI 2 as a scavenger are grown and their radioluminescence spectra and scintillation light decay curves are obtained. Addition of the quantities of the scavenger comparable with the total concentration of the oxygen‐containing admixtures in the melt results in complete destruction of the latter. In its turn, this causes the disappearance of the band with a maximum at 2.8 eV in the radioluminescence spectrum and decreases the fraction of the slow 2 µs‐component to 0.01. The addition of larger quantities of EuI 2 leads to the appearance of a wide band with the maximum at 2.8 eV characterized by a decay constant of 2 µs; its intensity increases with the EuI 2 concentration. The maximum ratio of two faster components with the decay constants equal to 7 and 30 ns approaches 0.58:0.41 at EuI 2 concentration in CsI melt equal to 0.01 mol·kg −1 .