Luminescence properties of CsI:Tl crystals codoped with Eu

• Дата: 2005
• Автори: Nagarkar, V.V., Ovechkina, E.E., Miller, S.R., Gaysinskiy, V., Brecherb, C., Lempickib, A., Bartramc, R.H.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2005
• Назва видання: Functional Materials
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/138874
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Luminescence properties of CsI:Tl crystals codoped with Eu / V.V. Nagarkar, E.E. Ovechkina, S.R. Miller, V. Gaysinskiy, C. Brecherb, A. Lempickib, R.H. Bartramc // Functional Materials. — 2005. — Т. 12, № 4. — С. 645-651. — Бібліогр.: 13 назв. — англ.

In investigating chemical approach for reducing the afterglow from Csl:TI, we were discovered es that a particularly effective ion for such afterglow suppression is Eu²⁺. We have extensively studied the effect of the Eu codopant on the luminescence from crystals of Csl:TI. Numerous single crystals of Csl:TI,Eu were grown by the Bridgman technique in evacuated quartz ampoules at concentrations between 0.05 and 0.5 mole percent. Three different materials were investigated as sources for the codopant: two variants of Eul₂ and elemental Eu metal. X-ray excited spectra revealed the presence of an additional peak at about 460 nm, characteristic of Eu²⁺ ions in the Csl lattice. The decay traces of the specimens reveal substantial variation in afterglow suppression, and possible reasons for these differences are examined and discussed.