Photo- and radiation-stimulated processes in CsI(Tl) crystals

Аннотация

The process of radiation-chemical coloration of CsI(Tl) crystals with different carbonate ion contamination has been studied. The presence of carbonate in the CsI(Tl) crystals deteriorates their photo- and radiation stability. Possible reasons for the charge carrier derealization in CsI(Tl) crystals under exposure to daylight and a role of oxygen-containing impurities in the formation of stable radiation defects have been established. A model of the hole activator color center is suggested. According to the model, the Tl²⁺ v_c ^- center is a Tl²⁺ hole activator center perturbed by a cation vacancy. The electron color centers Tl⁰v_a ⁺ are stabilized not only by the hole color centers of Tl²⁺ v_c ^- and I ₃ ^-, but also by the molecular anions of HCO ₃ ^- and CO₃ ^- formed as a result of the photo- and radio-chemical transformation of CO₃ ^2- and OH^- ions.

Язык оригинала	Английский
Номер статьи	4545222
Страницы (с-по)	1263-1269
Число страниц	7
Журнал	IEEE Transactions on Nuclear Science
Том	55
Номер выпуска	3
DOI	https://doi.org/10.1109/TNS.2008.924055
Состояние	Опубликовано - июн 2008

ASJC Scopus subject areas

Electrical and Electronic Engineering
Nuclear Energy and Engineering

Доступ к документу

10.1109/TNS.2008.924055

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Цитировать

Trefilova, L., Grinyov, B., Alekseev, V., Mitichkin, A., Yakovlev, V. Y., & Meleshko, A. (2008). Photo- and radiation-stimulated processes in CsI(Tl) crystals. IEEE Transactions on Nuclear Science, 55(3), 1263-1269. [4545222]. https://doi.org/10.1109/TNS.2008.924055

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title = "Photo- and radiation-stimulated processes in CsI(Tl) crystals",

abstract = "The process of radiation-chemical coloration of CsI(Tl) crystals with different carbonate ion contamination has been studied. The presence of carbonate in the CsI(Tl) crystals deteriorates their photo- and radiation stability. Possible reasons for the charge carrier derealization in CsI(Tl) crystals under exposure to daylight and a role of oxygen-containing impurities in the formation of stable radiation defects have been established. A model of the hole activator color center is suggested. According to the model, the Tl2+ vc - center is a Tl2+ hole activator center perturbed by a cation vacancy. The electron color centers Tl0va + are stabilized not only by the hole color centers of Tl2+ vc - and I 3 -, but also by the molecular anions of HCO 3 - and CO3 - formed as a result of the photo- and radio-chemical transformation of CO3 2- and OH- ions.",

keywords = "Cesium compounds, Infrared spectroscopy, Photochromism, Radiation effects",

author = "L. Trefilova and B. Grinyov and V. Alekseev and A. Mitichkin and Yakovlev, {V. Yu} and A. Meleshko",

year = "2008",

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doi = "10.1109/TNS.2008.924055",

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T1 - Photo- and radiation-stimulated processes in CsI(Tl) crystals

AU - Trefilova, L.

AU - Grinyov, B.

AU - Alekseev, V.

AU - Mitichkin, A.

AU - Yakovlev, V. Yu

AU - Meleshko, A.

PY - 2008/6

Y1 - 2008/6

N2 - The process of radiation-chemical coloration of CsI(Tl) crystals with different carbonate ion contamination has been studied. The presence of carbonate in the CsI(Tl) crystals deteriorates their photo- and radiation stability. Possible reasons for the charge carrier derealization in CsI(Tl) crystals under exposure to daylight and a role of oxygen-containing impurities in the formation of stable radiation defects have been established. A model of the hole activator color center is suggested. According to the model, the Tl2+ vc - center is a Tl2+ hole activator center perturbed by a cation vacancy. The electron color centers Tl0va + are stabilized not only by the hole color centers of Tl2+ vc - and I 3 -, but also by the molecular anions of HCO 3 - and CO3 - formed as a result of the photo- and radio-chemical transformation of CO3 2- and OH- ions.

AB - The process of radiation-chemical coloration of CsI(Tl) crystals with different carbonate ion contamination has been studied. The presence of carbonate in the CsI(Tl) crystals deteriorates their photo- and radiation stability. Possible reasons for the charge carrier derealization in CsI(Tl) crystals under exposure to daylight and a role of oxygen-containing impurities in the formation of stable radiation defects have been established. A model of the hole activator color center is suggested. According to the model, the Tl2+ vc - center is a Tl2+ hole activator center perturbed by a cation vacancy. The electron color centers Tl0va + are stabilized not only by the hole color centers of Tl2+ vc - and I 3 -, but also by the molecular anions of HCO 3 - and CO3 - formed as a result of the photo- and radio-chemical transformation of CO3 2- and OH- ions.

KW - Cesium compounds

KW - Infrared spectroscopy

KW - Photochromism

KW - Radiation effects

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