The reasons the scintillation efficiency decrease of CsI(Tl) crystals exposed by the high-dosed radiation

Аннотация

The role of radiation defects in the light yield degradation of CsI(Tl) scintillation detectors has been investigated. The spectra and decay kinetic study of the luminescence of CsI(Tl) crystals coloured by γ-radiation (⁶⁰Co, 10⁶ Gy) allowed to conclude that two types of the centres induced by irradiation absorb the luminescence of Tl⁺ centres responsible for the scintillations. The reabsorption of the Tl⁺ emission leads to the appearance of the long-wavelength luminescence caused by the colour centres of the first type. The luminescence of the centres of the second type is quenched at room temperature. These centres are not only deteriorating the efficiency of the activator luminescence, but also functioning as quenching centres to which the non-radiative energy transfer from Tl⁺ centres is realized.

Язык оригинала	Английский
Страницы (с-по)	839-842
Число страниц	4
Журнал	Radiation Measurements
Том	42
Номер выпуска	4-5
DOI	https://doi.org/10.1016/j.radmeas.2007.02.034
Состояние	Опубликовано - апр 2007

ASJC Scopus subject areas

Radiation

Доступ к документу

10.1016/j.radmeas.2007.02.034

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The reasons the scintillation efficiency decrease of CsI(Tl) crystals exposed by the high-dosed radiation. / Trefilova, L.; Grinyov, B.; Alekseev, V.; Golub, I.; Yakovlev, V.; Meleshko, A.

В: Radiation Measurements, Том 42, № 4-5, 04.2007, стр. 839-842.

Результат исследований: Материалы для журнала › Статья › рецензирование

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abstract = "The role of radiation defects in the light yield degradation of CsI(Tl) scintillation detectors has been investigated. The spectra and decay kinetic study of the luminescence of CsI(Tl) crystals coloured by γ-radiation (60Co, 106 Gy) allowed to conclude that two types of the centres induced by irradiation absorb the luminescence of Tl+ centres responsible for the scintillations. The reabsorption of the Tl+ emission leads to the appearance of the long-wavelength luminescence caused by the colour centres of the first type. The luminescence of the centres of the second type is quenched at room temperature. These centres are not only deteriorating the efficiency of the activator luminescence, but also functioning as quenching centres to which the non-radiative energy transfer from Tl+ centres is realized.",

keywords = "CsI(Tl) crystal, Energy transfer, Irradiation, Quenching centre",

author = "L. Trefilova and B. Grinyov and V. Alekseev and I. Golub and V. Yakovlev and A. Meleshko",

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T1 - The reasons the scintillation efficiency decrease of CsI(Tl) crystals exposed by the high-dosed radiation

AU - Trefilova, L.

AU - Grinyov, B.

AU - Alekseev, V.

AU - Golub, I.

AU - Yakovlev, V.

AU - Meleshko, A.

PY - 2007/4

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N2 - The role of radiation defects in the light yield degradation of CsI(Tl) scintillation detectors has been investigated. The spectra and decay kinetic study of the luminescence of CsI(Tl) crystals coloured by γ-radiation (60Co, 106 Gy) allowed to conclude that two types of the centres induced by irradiation absorb the luminescence of Tl+ centres responsible for the scintillations. The reabsorption of the Tl+ emission leads to the appearance of the long-wavelength luminescence caused by the colour centres of the first type. The luminescence of the centres of the second type is quenched at room temperature. These centres are not only deteriorating the efficiency of the activator luminescence, but also functioning as quenching centres to which the non-radiative energy transfer from Tl+ centres is realized.

AB - The role of radiation defects in the light yield degradation of CsI(Tl) scintillation detectors has been investigated. The spectra and decay kinetic study of the luminescence of CsI(Tl) crystals coloured by γ-radiation (60Co, 106 Gy) allowed to conclude that two types of the centres induced by irradiation absorb the luminescence of Tl+ centres responsible for the scintillations. The reabsorption of the Tl+ emission leads to the appearance of the long-wavelength luminescence caused by the colour centres of the first type. The luminescence of the centres of the second type is quenched at room temperature. These centres are not only deteriorating the efficiency of the activator luminescence, but also functioning as quenching centres to which the non-radiative energy transfer from Tl+ centres is realized.

KW - CsI(Tl) crystal

KW - Energy transfer

KW - Irradiation

KW - Quenching centre

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