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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| Дата: | 2005 |
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| Автори: | , , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
НТК «Інститут монокристалів» НАН України
2005
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| 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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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 |
| work_keys_str_mv |
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| first_indexed |
2025-11-27T09:28:27Z |
| last_indexed |
2025-11-27T09:28:27Z |
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1849935227890171904 |
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