Apr 15 – 16, 2019
University of Surrey
Europe/London timezone

Spectroscopic and Timing Performances of SrI2:Eu Scintillation Crystal Coupled to PMT and SiPM

Apr 15, 2019, 5:30 PM
University of Surrey

University of Surrey

Guildford, UK
Submitted Poster Detector Materials Session 4: Poster session and drinks reception


Mohammad Nakhostin


The europium-doped strontium iodide (SrI2:Eu) scintillator was first discovered in 1968 by Hofstadter [1]. In recent years, owing to the significant improvements in the technology of crystal grow of this scintillator, it has emerged as a strong candidate for gamma-ray spectroscopy applications [2]. This crystal exhibits extremely high light yield, proportional response, and very low level of internal radiation which is of importance for low level radiation measurement applications. The energy resolution of this material is close to 3 % at 662 keV energy, about 2 times better than the commonly used members of the iodide family such as NaI:Tl. In particular, coupling this crystal to silicon
photomultipliers (SiPM) is very attractive due to compactness and low-voltage operation. In this work, we report on the spectroscopic and timing performance of a SrI2:Eu crystal separately coupled to a photomultiplier tube (PMT) and
a SiPM. The effects of the very long decay-time constant of >1 μs and large light output of SrI2:Eu on the readout and processing of the scintillation pulses are explored.

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