On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals

Effects of thermal annealing in different gaseous media (vacuum, oxygen-containing and reductive atmospheres) upon main optical, luminescence, spectral kinetic, and scintillation characteristics of GSO:Се crystals - both subjected and not subjected to y-irradiation (10⁴-10⁶ rad) - have been studied....

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Бібліографічні деталі
Дата:2005
Автори: Nagornaya, L., Starzhinskiy, N., Bondar, V., Grinyov, B., Katrunov, K., Loseva, E., Onishchenko, G., Ryzhikov, V., Semynozhenko, V.
Формат: Стаття
Мова:English
Опубліковано: НТК «Інститут монокристалів» НАН України 2005
Назва видання:Functional Materials
Онлайн доступ:https://nasplib.isofts.kiev.ua/handle/123456789/136904
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals / L. Nagornaya, N. Starzhinskiy, V. Bondar, B. Grinyov, K. Katrunov, E. Loseva, G. Onishchenko, V. Ryzhikov, V. Semynozhenko // Functional Materials. — 2005. — Т. 12, № 2. — С. 251-255. — Бібліогр.: 8 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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spelling nasplib_isofts_kiev_ua-123456789-1369042025-02-09T15:27:16Z On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals Радіаційно-стимульовані оптичні і люмінесцентні явища у термічно оброблених кристалах GSO:Ce Nagornaya, L. Starzhinskiy, N. Bondar, V. Grinyov, B. Katrunov, K. Loseva, E. Onishchenko, G. Ryzhikov, V. Semynozhenko, V. Effects of thermal annealing in different gaseous media (vacuum, oxygen-containing and reductive atmospheres) upon main optical, luminescence, spectral kinetic, and scintillation characteristics of GSO:Се crystals - both subjected and not subjected to y-irradiation (10⁴-10⁶ rad) - have been studied. The heat treatment in oxygen-containing media worsens the transparence and light yield, which is explained by partial transformation of cerium ions into a state of a higher oxidation degree (Се³⁺➔Се⁴⁺), with Се⁴⁺ not involved in scintillation processes and playing the role of absorption centers for the intrinsic radiation. On the contrary, the heat treatment of GSO:Сеcrystals in vacuum may result in a certain improvement of their scintillation characteristics, probably related to the inverse transformation of the cerium charge state (Се³⁺➔Се⁴⁺). GSO:Се crystals that had been thermally pre-treated in vacuum show substantial degradation of their optical and luminescent characteristics under irradiation. This can be related to oxygen vacancies Vₒ that emerge during vacuum annealing and form F-centers under y-irradiation. Дослiджено вплив термiчного вiдпалу у рiзних газових середовищах (вакуум, окислювальне i вiдновлювальне середовища) на основнi оптико-люмiнесцентнi, спектрально-кiнетичнi i сцинтиляцiйнi характеристики кристалiв GSO:Се як неопромiнених, так i пiсля y-опромiнювання дозами 10⁴-10⁶ рад. Погiршення прозоростi i свiтлового виходу при термообробцi в окислювальному середовищi пояснюється частковим переходом iонiв церiю у стан з вищим ступенем окислення (Се³⁺➔Се⁴⁺), при яких iони Се⁴⁺ вже не беруть участi у сцинтиляцiйних процесах, але грають роль центрiв поглинання власного випромiнювання у кристалi i, навпаки, незначне полiпшення цих характеристик у разi термiчноЇ обробки у вакуумi, може бути пов'язано iз зворотньою трансформацiею зарядного стану (Се³⁺➔Се⁴⁺). Найбiльшу радiацiйно-iндуковану деградацiю оптичних i люмiнесцентних характеристик показують кристали GSO:Се, що заздалегiдь пройшли термiчний вiдпал у вакуумi, внаслiдок чого вiдбуваеться утворення кисневих вакансiй Vₒ, якi при y-опромiнюваннi утворюють F-центри. Исследовано влияние термического отжига в различных газовых средах (вакуум, кислородсодержащая и восстановительная среды) на основные оптико-люминесцентные, спектрально-кинетические и сцинтилляционные характеристики кристаллов GSO:Се как необлученных, так и подвергнутых y-облучению дозами 10⁴-10⁶ рад. Ухудшение уровня прозрачности и величины светового выхода при термообработке в кислородсодержащей среде объясняется частичным переходом ионов церия в состояние с более высокой степенью окисления (Се³⁺➔Се⁴⁺), при которых ионы Се⁴⁺ уже не участвуют в сцинтилляционных процессах, но играют роль центров поглощения собственного излучения в кристалле и, наоборот, незначительное улучшение этих характеристик в случае термической обработки в вакууме может быть связано с обратной трансформацией зарядового состояния (Се³⁺➔Се⁴⁺). Наибольшую радиационно-индуцированную деградацию оптических и люминесцентных характеристик показывают кристаллы, предварительно прошедшие термический отжиг в вакууме, в результате чего происходит образование кислородных вакансий Vₒ, которые при y-облучения образуют F-центры. 2005 Article On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals / L. Nagornaya, N. Starzhinskiy, V. Bondar, B. Grinyov, K. Katrunov, E. Loseva, G. Onishchenko, V. Ryzhikov, V. Semynozhenko // Functional Materials. — 2005. — Т. 12, № 2. — С. 251-255. — Бібліогр.: 8 назв. — англ. 1027-5495 https://nasplib.isofts.kiev.ua/handle/123456789/136904 en Functional Materials application/pdf НТК «Інститут монокристалів» НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description Effects of thermal annealing in different gaseous media (vacuum, oxygen-containing and reductive atmospheres) upon main optical, luminescence, spectral kinetic, and scintillation characteristics of GSO:Се crystals - both subjected and not subjected to y-irradiation (10⁴-10⁶ rad) - have been studied. The heat treatment in oxygen-containing media worsens the transparence and light yield, which is explained by partial transformation of cerium ions into a state of a higher oxidation degree (Се³⁺➔Се⁴⁺), with Се⁴⁺ not involved in scintillation processes and playing the role of absorption centers for the intrinsic radiation. On the contrary, the heat treatment of GSO:Сеcrystals in vacuum may result in a certain improvement of their scintillation characteristics, probably related to the inverse transformation of the cerium charge state (Се³⁺➔Се⁴⁺). GSO:Се crystals that had been thermally pre-treated in vacuum show substantial degradation of their optical and luminescent characteristics under irradiation. This can be related to oxygen vacancies Vₒ that emerge during vacuum annealing and form F-centers under y-irradiation.
format Article
author Nagornaya, L.
Starzhinskiy, N.
Bondar, V.
Grinyov, B.
Katrunov, K.
Loseva, E.
Onishchenko, G.
Ryzhikov, V.
Semynozhenko, V.
spellingShingle Nagornaya, L.
Starzhinskiy, N.
Bondar, V.
Grinyov, B.
Katrunov, K.
Loseva, E.
Onishchenko, G.
Ryzhikov, V.
Semynozhenko, V.
On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals
Functional Materials
author_facet Nagornaya, L.
Starzhinskiy, N.
Bondar, V.
Grinyov, B.
Katrunov, K.
Loseva, E.
Onishchenko, G.
Ryzhikov, V.
Semynozhenko, V.
author_sort Nagornaya, L.
title On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals
title_short On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals
title_full On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals
title_fullStr On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals
title_full_unstemmed On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals
title_sort on radiation-induced optical and luminescence phenomena in thermally pretreated gso:ce crystals
publisher НТК «Інститут монокристалів» НАН України
publishDate 2005
url https://nasplib.isofts.kiev.ua/handle/123456789/136904
citation_txt On radiation-induced optical and luminescence phenomena in thermally pretreated GSO:Ce crystals / L. Nagornaya, N. Starzhinskiy, V. Bondar, B. Grinyov, K. Katrunov, E. Loseva, G. Onishchenko, V. Ryzhikov, V. Semynozhenko // Functional Materials. — 2005. — Т. 12, № 2. — С. 251-255. — Бібліогр.: 8 назв. — англ.
series Functional Materials
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first_indexed 2025-11-27T09:28:27Z
last_indexed 2025-11-27T09:28:27Z
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