MRS Proceedings

Table of Contents - Volume  1164  - Symposium L – Nuclear Radiation Detection Materials–2009  

Editors : D.L. Perry, A. Burger, L. Franks, K. Yasuda, M. Fiederie

Articles

Prospects for High Energy Resolution Gamma Ray Spectroscopy with Europium-Doped Strontium Iodide

2009 MRS Spring Meeting.

Nerine Cherepya1, S A. Paynea2, Rastgo Hawramia3, A Burgera4, Lynn Boatnera5, Edgar Van Loefa6 and Kanai Shaha7

a1 cherepy1@llnl.gov, LLNL, Livermore, California, United States

a2 payne3@llnl.gov, LLNL, Livermore, California, United States

a3 drh1980@gmail.com, Fisk University, Nashville, Tennessee, United States

a4 aburger@fisk.edu, United States

a5 boatnerla@ornl.gov, ORNL, Oak Ridge, Tennessee, United States

a6 vanLoef@gmail.com, RMD, Watertown, Massachusetts, United States

a7 kanaishah@yahoo.com, RMD, Watertown, Massachusetts, United States

Abstract

Europium-doped strontium iodide scintillators offer a light yield exceeding 100,000 photons/MeV and excellent light yield proportionality, while at the same time, SrI2 is readily grown in single crystal form. Thus far, our collaboration has demonstrated an energy resolution with strontium iodide of 2.6% at 662 keV and 7.6% at 60 keV, and we have grown single crystals surpassing 30 cm3 in size (with lower resolution). Our analysis indicates that SrI2(Eu) has the potential to offer 2% energy resolution at 662 keV with optimized material, optics, and read-out. In particular, improvements in feedstock purity may result in crystal structural and chemical homogeneity, leading to improved light yield uniformity throughout the crystal volume, and consequently, better energy resolution. Uniform, efficient light collection and detection, is also required to achieve the best energy resolution with a SrI2(Eu) scintillator device.

(Received April 04 2009)

(Accepted April 21 2009)

Key Words

  • luminescence;
  • crystal growth;
  • devices
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