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This content will become publicly available on September 15, 2018

Title: History and current status of strontium iodide scintillators

Eu-doped strontium iodide single crystal growth has reached maturity and prototype SrI 2(Eu)-based gamma ray spectrometers provide detection performance advantages over standard detectors. SrI 2(Eu) offers a high, proportional light yield of >80,000 photons/MeV. Energy resolution of <3% at 662 keV with 1.5” x 1.5” SrI2(Eu) crystals is routinely achieved, by employing either a small taper at the top of the crystal or a digital readout technique. These methods overcome light-trapping, in which scintillation light is re-absorbed and re-emitted in Eu 2+-doped crystals. As a result, its excellent energy resolution, lack of intrinsic radioactivity or toxicity, and commercial availability make SrI 2(Eu) the ideal scintillator for use in handheld radioisotope identification devices. A 6-lb SrI 2(Eu) radioisotope identifier is described.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [5] ;  [1] ;  [1] ;  [6]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Fisk Univ., Nashville, TN (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Bridgeport Instruments, LLC, Austin, TX (United States)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Northrop Grumman Synoptics, Charlotte, NC (United States)
  6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Radiation Monitoring Devices, Inc., Watertown, MA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-738122
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
SPIE Optical Engineering+ Applications
Additional Journal Information:
Journal Name: SPIE Optical Engineering+ Applications; Journal Volume: 10392
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Strontium Iodide; scintillator; gamma ray spectroscopy; gamma spectromete
OSTI Identifier:
1438712