History and current status of strontium iodide scintillators

Conference · Fri Sep 01 00:00:00 EDT 2017

DOI:https://doi.org/10.1117/12.2276302· OSTI ID:1407719

Cherepy, Nerine ^[1]; Boatner, Lynn A.  ^[2]

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1. Lawrence Livermore National Laboratory (LLNL)
2. ORNL

Eu-doped strontium iodide single crystal growth has reached maturity and prototype SrI2(Eu)-based gamma ray spectrometers provide detection performance advantages over standard detectors. SrI2(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 Eu2+-doped crystals. Its excellent energy resolution, lack of intrinsic radioactivity or toxicity, and commercial availability make SrI2(Eu) the ideal scintillator for use in handheld radioisotope identification devices. A 6-lb SrI2(Eu) radioisotope identifier is described.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1407719
• Resource Relation: Conference: SPIE Optical Engineering + Applications 2017 - San Diego, California, United States of America - 8/6/2017 4:00:00 AM-8/10/2017 4:00:00 AM
• Country of Publication: United States
• Language: English