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Yakovlev, V.; Meleshko, A.; Trefilova, L., E-mail: yak999@rambler.ru2008
AbstractAbstract
[en] The absorption and luminescence properties of CsI(Tl) crystals colored by irradiation are studied by the method of the time-resolved spectroscopy. The scheme of the electron transitions in CsI(Tl) crystal is suggested to explain the appearance of the color centers under exposure to the near-UV light. It is established that either of the two types activator color centers holds the charge carrier with opposite sign. The model of the hole Tl2+vc- activator color center is suggested. According to the model the positive charge of Tl2+ ion is compensated by the negative charge of a close cation vacancy vc-. The color center emission reveals in the cathode-luminescence spectrum of the colored CsI(Tl) crystal. The high-dose irradiation of CsI(Tl) crystal results in the reduction of the decay time of the near-thallium self-trapped excitons (STE) emission. The decay kinetics of Tl2+vc- emission contains the time components typical for the decay kinetics of near-thallium STE emission. The reason of the observed effects is the energy transfer from the near-thallium STE excitons to the color centers via the inductive-resonant mechanism
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S0022-2313(08)00056-2; Available from http://dx.doi.org/10.1016/j.jlumin.2008.01.020; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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ALKALI METAL COMPOUNDS, CESIUM COMPOUNDS, CHARGED PARTICLES, CRYSTAL DEFECTS, CRYSTAL STRUCTURE, DOSES, ELECTROMAGNETIC RADIATION, ELEMENTS, EMISSION, HALIDES, HALOGEN COMPOUNDS, INORGANIC PHOSPHORS, IODIDES, IODINE COMPOUNDS, IONS, MATERIALS, METALS, PHOSPHORS, PHOTON EMISSION, POINT DEFECTS, QUASI PARTICLES, RADIATIONS, VACANCIES
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