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Title: Cesium hafnium chloride: A high light yield, non-hygroscopic cubic crystal scintillator for gamma spectroscopy

We report on the scintillation properties of Cs{sub 2}HfCl{sub 6} (cesium hafnium chloride or CHC) as an example of a little-known class of non-hygroscopic compounds having the generic cubic crystal structure of K{sub 2}PtCl{sub 6}. The crystals are easily growable from the melt using the Bridgman method with minimal precursor treatments or purification. CHC scintillation is centered at 400 nm, with a principal decay time of 4.37 μs and a light yield of up to 54 000 photons/MeV when measured using a silicon CCD photodetector. The light yield is the highest ever reported for an undoped crystal, and CHC also exhibits excellent light yield nonproportionality. These desirable properties allowed us to build and test CHC gamma-ray spectrometers providing energy resolution of 3.3% at 662 keV.
Authors:
 [1] ;  [2] ; ; ;  [1] ; ; ; ;  [3]
  1. Department of Life and Physical Sciences, Fisk University, Nashville, Tennessee 37208 (United States)
  2. (United States)
  3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
22482225
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BRIDGMAN METHOD; CESIUM; CHARGE-COUPLED DEVICES; CRYSTAL STRUCTURE; CRYSTALS; ENERGY RESOLUTION; GAMMA SPECTROMETERS; GAMMA SPECTROSCOPY; HAFNIUM CHLORIDES; PHOTONS; SCINTILLATIONS; SILICON; VISIBLE RADIATION; YIELDS