Prospects for High Energy Resolution Gamma Ray Spectroscopy with Europium-Doped Strontium
- Lawrence Livermore National Laboratory (LLNL)
- Fisk University, Nashville, TN
- ORNL
- Radiation Monitoring Devices, Watertown, MA
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- Work for Others (WFO)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 963920
- Resource Relation:
- Conference: 2009 MRS Spring Meeting, Symposium on Nuclear Radiation Detection Materials, San Francisco, CA, USA, 20090413, 20090417
- Country of Publication:
- United States
- Language:
- English
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