From Event: SPIE Optical Engineering + Applications, 2017
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.
N. J. Cherepy, P. R. Beck, S. A. Payne, E. L. Swanberg, B. M. Wihl, S. E. Fisher, S. Hunter, P. A. Thelin, C. J. Delzer, S. Shahbazi, A. Burger, K. S. Shah, R. Hawrami, L. A. Boatner, M. Momayezi, K. Stevens, M. H. Randles, and D. Solodovnikov, "History and current status of strontium iodide scintillators," Proc. SPIE 10392, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX, 1039202 (Presented at SPIE Optical Engineering + Applications: August 07, 2017; Published: 15 September 2017); https://doi.org/10.1117/12.2276302.
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