Luminescence of CWO single crystals containing various defects

Influence of dopant-induced defects on luminescence and performance characteristics of CWO crystals has been studied. Мо and Fe have been shown to give rise to a specific "red" emission component with decay time of several hundreds of microseconds or more, while trivalent dopants cause for...

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Datum:2005
Hauptverfasser: Grinyov, B.V., Moroz, Z.T., Nagornaya, L.L., Pashkovsky, M.S., Ryzhikov, V.D., Tupitsyna, I.A., Apanasenko, A.L.
Format: Artikel
Sprache:English
Veröffentlicht: НТК «Інститут монокристалів» НАН України 2005
Schriftenreihe:Functional Materials
Online Zugang:http://dspace.nbuv.gov.ua/handle/123456789/136900
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Zitieren:Luminescence of CWO single crystals containing various defects / B.V. Grinyov, Z.T. Moroz, L.L. Nagornaya, M.S. Pashkovsky, V.D. Ryzhikov, I.A. Tupitsyna, A.L. Apanasenko // Functional Materials. — 2005. — Т. 12, № 2. — С. 256-260. — Бібліогр.: 9 назв. — англ.

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spelling irk-123456789-1369002018-06-18T03:04:14Z Luminescence of CWO single crystals containing various defects Grinyov, B.V. Moroz, Z.T. Nagornaya, L.L. Pashkovsky, M.S. Ryzhikov, V.D. Tupitsyna, I.A. Apanasenko, A.L. Influence of dopant-induced defects on luminescence and performance characteristics of CWO crystals has been studied. Мо and Fe have been shown to give rise to a specific "red" emission component with decay time of several hundreds of microseconds or more, while trivalent dopants cause formation of deep charge carrier traps responsible for the millisecond range afterglow. These defects give rise also to the color centers causing absorption in the intrinsic emission band, thus deteriorating the crystal scintillation parameters. The studies performed allowed to develop a technology of large high-quality CWO crystals. The tomographic elements manufactured from those crystals showed an afterglow of less than 100 ppm after 20 ms and the light yield of about 20,000 photons per MeV. Исследовано влияние примесных дефектов на люминесцентные и функциональные характеристики кристаллов CWO. Показано, что Мо и Fe образуют в кристаллах специфические "красные" компоненты свечения с временами высвечивания несколько сотен и более микросекунд, трехвалентные примеси приводят к образованию глубоких ловушек носителей заряда, ответственных за послесвечение в миллисекундном диапазоне. Эти дефекты также ответственны за образование центров окраски, поглощающих в области собственного свечения, что ухудшает сцинтилляционные характеристики кристаллов. Проведенные нами исследования позволили разработать технологический процесс получения крупногабаритных кристаллов CWO улучшенного качества. Томографические элементы, изготовленные из этих кристаллов, имели послесвечение менее 100 ppm через 20 мс, световой выход - 20000 фотон/МэВ. Вивчено вплив домiшкових дефектiв на люмiнесцентнi i функцiональнi характеристики кристалiв CWO. Показано, що Мо i Fe утворюють в кристалах CWO специфiчнi "червонi" компоненти свiчення з часами висвiчення декiлька сотень i бiльше мiкросекунд, тривалентнi домiшки приводять до утворення глибоких пасток носiiв заряду, вiдповiдальних за пiслясвiчення у мiлiсекундному дiапазонi. Цi дефекти також вiдповiдальнi за утворення центрiв забарвлення, поглинаючих в областi власного свiчення, що погiршує сцинтиляцiйнi характеристики кристалiв. Проведенi нами дослiдження дозволили розробити технологiчний процес отримання великогабаритних кристалiв CWO полiпшеної якостi. Томографiчнi елементи, виготовленi з цих кристалiв, мали пiслясвiчення менше 100 ppm через 20 мс, свiтловий вихiд - 20000 фотон/МеВ. 2005 Article Luminescence of CWO single crystals containing various defects / B.V. Grinyov, Z.T. Moroz, L.L. Nagornaya, M.S. Pashkovsky, V.D. Ryzhikov, I.A. Tupitsyna, A.L. Apanasenko // Functional Materials. — 2005. — Т. 12, № 2. — С. 256-260. — Бібліогр.: 9 назв. — англ. 1027-5495 http://dspace.nbuv.gov.ua/handle/123456789/136900 en Functional Materials НТК «Інститут монокристалів» НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description Influence of dopant-induced defects on luminescence and performance characteristics of CWO crystals has been studied. Мо and Fe have been shown to give rise to a specific "red" emission component with decay time of several hundreds of microseconds or more, while trivalent dopants cause formation of deep charge carrier traps responsible for the millisecond range afterglow. These defects give rise also to the color centers causing absorption in the intrinsic emission band, thus deteriorating the crystal scintillation parameters. The studies performed allowed to develop a technology of large high-quality CWO crystals. The tomographic elements manufactured from those crystals showed an afterglow of less than 100 ppm after 20 ms and the light yield of about 20,000 photons per MeV.
format Article
author Grinyov, B.V.
Moroz, Z.T.
Nagornaya, L.L.
Pashkovsky, M.S.
Ryzhikov, V.D.
Tupitsyna, I.A.
Apanasenko, A.L.
spellingShingle Grinyov, B.V.
Moroz, Z.T.
Nagornaya, L.L.
Pashkovsky, M.S.
Ryzhikov, V.D.
Tupitsyna, I.A.
Apanasenko, A.L.
Luminescence of CWO single crystals containing various defects
Functional Materials
author_facet Grinyov, B.V.
Moroz, Z.T.
Nagornaya, L.L.
Pashkovsky, M.S.
Ryzhikov, V.D.
Tupitsyna, I.A.
Apanasenko, A.L.
author_sort Grinyov, B.V.
title Luminescence of CWO single crystals containing various defects
title_short Luminescence of CWO single crystals containing various defects
title_full Luminescence of CWO single crystals containing various defects
title_fullStr Luminescence of CWO single crystals containing various defects
title_full_unstemmed Luminescence of CWO single crystals containing various defects
title_sort luminescence of cwo single crystals containing various defects
publisher НТК «Інститут монокристалів» НАН України
publishDate 2005
url http://dspace.nbuv.gov.ua/handle/123456789/136900
citation_txt Luminescence of CWO single crystals containing various defects / B.V. Grinyov, Z.T. Moroz, L.L. Nagornaya, M.S. Pashkovsky, V.D. Ryzhikov, I.A. Tupitsyna, A.L. Apanasenko // Functional Materials. — 2005. — Т. 12, № 2. — С. 256-260. — Бібліогр.: 9 назв. — англ.
series Functional Materials
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AT nagornayall luminescenceofcwosinglecrystalscontainingvariousdefects
AT pashkovskyms luminescenceofcwosinglecrystalscontainingvariousdefects
AT ryzhikovvd luminescenceofcwosinglecrystalscontainingvariousdefects
AT tupitsynaia luminescenceofcwosinglecrystalscontainingvariousdefects
AT apanasenkoal luminescenceofcwosinglecrystalscontainingvariousdefects
first_indexed 2025-07-10T02:12:50Z
last_indexed 2025-07-10T02:12:50Z
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