15 September 2017 History and current status of strontium iodide scintillators
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Abstract
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.
Conference Presentation
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N. J. Cherepy, N. J. Cherepy, P. R. Beck, P. R. Beck, S. A. Payne, S. A. Payne, E. L. Swanberg, E. L. Swanberg, B. M. Wihl, B. M. Wihl, S. E. Fisher, S. E. Fisher, S. Hunter, S. Hunter, P. A. Thelin, P. A. Thelin, C. J. Delzer, C. J. Delzer, S. Shahbazi, S. Shahbazi, A. Burger, A. Burger, K. S. Shah, K. S. Shah, R. Hawrami, R. Hawrami, L. A. Boatner, L. A. Boatner, M. Momayezi, M. Momayezi, K. Stevens, K. Stevens, M. H. Randles, M. H. Randles, D. Solodovnikov, D. Solodovnikov, } "History and current status of strontium iodide scintillators", Proc. SPIE 10392, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX, 1039202 (15 September 2017); doi: 10.1117/12.2276302; https://doi.org/10.1117/12.2276302
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