TlSr2I5:Eu2+- A new high density scintillator for gamma-ray detection

Soundara Pandian, Lakshmi; Loyd, Matthew; Du, Mao-Hua; van Loef, Edgar; Ciampi, Guido; Stand, Luis; Zhuravleva, Mariya; Koschan, Merry; Glodo, Jarek; Melcher, Charles; Shah, Kanai

doi:10.1016/j.nima.2020.164876

TlSr₂I₅:Eu₂₊- A new high density scintillator for gamma-ray detection

Journal Article · Tue Nov 24 00:00:00 EST 2020 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2020.164876· OSTI ID:1735452

^[1]; Loyd, Matthew ^[2]; ^[3]; ^[1]; Ciampi, Guido ^[1]; ^[2]; Zhuravleva, Mariya ^[2]; Koschan, Merry ^[2]; Glodo, Jarek ^[1]; Melcher, Charles ^[2]; Shah, Kanai ^[1]

Radiation Monitoring Devices, Inc., Watertown, MA (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this paper we report on the scintillation properties of TlSr₂I₅ doped with Eu²⁺, a novel thallium-containing high-resolution scintillator for gamma-ray spectroscopy. Here, small diameter, good quality crystals of TlSr₂I₅:Eu (TSI) with different Eu²⁺ concentrations were grown by the vertical Bridgman method. X-ray diffraction measurements show that single crystals of TSI belong to the monoclinic system with space group P2₁/c. TlSr₂I₅ has a density of 5.32 g/cm³ and effective Z of 60. The X-ray excited emission of Eu²⁺ doped TlSr₂I₅ features a broad emission band peaking between 460–470 nm. The light yield of TlSr₂I₅ crystal doped with 1% Eu²⁺ is measured to be ~72,000 ph/MeV with an energy resolution of 2.8% at 662 keV. The scintillation decay time which is characteristic of Eu²⁺ shows two components, with 90% of the light in a ~500 ns component and the rest in a longer component of ~3 μs.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Defense Threat Reduction Agency (DTRA); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC05-00OR22725; NA0003180

OSTI ID:: 1735452

Alternate ID(s):: OSTI ID: 1776943

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: N/A Vol. 988; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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