Difficulties and improvement in growth of Europium doped Strontium Iodide (SrI2:Eu2+) scintillator single crystal for radiation detection applications

JOURNAL OF ALLOYS AND COMPOUNDS

卷:747

Article

Raja, A.¹  Daniel, D. Joseph²  Ramasamy, P.¹  Singh, S. G.³  Sen, S.³  Gadkari, S. C.³ 

[1] SSN Coll Engn, SSN Res Ctr, Kalavakkam 603110, India

[2] Kyungpook Natl Univ, Dept Phys, Daegu 702701, South Korea

[3] Bhabha Atom Res Ctr, TPD, Crystal Technol Sect, Bombay 400085, Maharashtra, India

关键词: Crystal growth;    Photoluminescence;    X-ray luminescence;    Scintillator;    Gamma ray detector;   

DOI  :  10.1016/j.jallcom.2018.03.097

来源: Elsevier

【 摘 要 】

The molten salt of Strontium Iodide (SrI2) and Europium Iodide (EuI2) was filtered by specially designed dual chamber quartz ampoule using micro frit filter. Eu2+ doped SrI2 single crystal was grown by modified transparent vertical Bridgman technique. Photoluminescence (PL) excitation and emission (PLE) were recorded for the grown crystal. The characteristic emission of Eu2+ was observed at 432 nm. Similar emission was observed at 435 nm, when the sample was excited by X-ray source also. Scintillation properties of the SrI2: Eu2+ crystal were checked by the gamma ray spectrometer using Cs-137, Co-57 and Co-60 gamma sources. The energy resolutions of the grown crystal were found to be 4.6% at 662 KeV, 7.5% at 122 KeV and 9.8% at 1332 KeV. The Scintillation decay profile was also analyzed. The scintillation decay time of Eu2+ ion was calculated to be 1.26 ms for SrI2: Eu2+ single crystal. (c) 2018 Elsevier B.V. All rights reserved.

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