Preliminary investigation of scintillator materials properties: SrI₂:Eu, CeBr₃ and GYGAG:Ce for gamma rays up to 9 MeV

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• 作者：A. Giaz^a ; ^{agnese.giaz@mi.infn.it" class="auth_mail" title="E-mail the corresponding author} ; G. Hull^b ; V. Fossati^c ; N. Cherepy^d ; F. Camera^a ; ^c ; N. Blasi^a ; S. Brambilla^a ; S. Coelli^a ; B. Million^a ; S. Riboldi^a ; ^c
• 关键词：Scitillator detectors ; Gamma raysy ; Gamma Spectroscopy
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2015
• 出版时间：21 December 2015
• 年：2015
• 卷：804
• 期：Complete
• 页码：212-220
• 全文大小：1775 K

文摘

In this work we measured the performance of a 2ʺ×2ʺ cylindrical tapered crystal of SrI₂:Eu, a 2ʺ×3ʺ cylindrical sample of CeBr₃ and a 2ʺ×0.3ʺ cylindrical sample of GYGAG:Ce. These scintillators are prototypes in volume or material and were provided by the Lawrence Livermore National Laboratory and by the Institut de Physique Nucléaire d׳Orsay. The gamma-ray energy resolution was measured in the energy range of 0.1–9 MeV using different sources. Each scintillator was scanned along x, y and z axes, using a 400 MBq collimated ¹³⁷Cs source. Owing to the GYGAG:Ce thickness, it was not possible to obtain the value of the energy resolution at 9 MeV and to scan the crystal along the z axis. The 662 keV full energy peak position and its FWHM were measured relative to the full energy peaks positions produced by a non-collimated ⁸⁸Y source. The signals of the detectors were additionally digitized and compared, up to 9 MeV, using a 12 bit LeCroy 600 MHz oscilloscope.