Instrument Development and Gamma Spectroscopy with Strontium Iodide

Conference · Sat Dec 31 23:00:00 EST 2011

OSTI ID:1055063

Cherepy, Nerine ^[1]; Payne, Stephen A. ^[1]; Sturm, Benjamin ^[1]; Drury, Owen ^[1]; O’Neal, S P ^[1]; Thelin, P ^[1]; Shah, Kanai ^[2]; Hawrami, Rastgo ^[3]; Momayezi, M ^[4]; Hurst, B. ^[4]; Wiggen, B. ^[3]; Bhattacharya, P. ^[3]; Burger, Arnold ^[3]; Boatner, Lynn A ^[5]; Ramey, Joanne Oxendine ^[5]

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1. Lawrence Livermore National Laboratory (LLNL)
2. Radiation Monitoring Devices, Watertown, MA
3. Fisk University, Nashville, TN
4. Bridgeport Instruments, Austin TX
5. ORNL

Development of the Europium-doped Strontium Iodide scintillator, SrI2(Eu), involves advances in crystal growth, optics and readout methodology for prototype detectors. We have demonstrated energy resolution of 3% at 662 keV for a 26 cm3 SrI2(Eu) crystal, which is comparable to the performance obtained with Cerium-doped Lanthanum Bromide of equivalent size. Compared to standard analog readout, use of a digital readout method allows improved energy resolution to be obtained with large-volume SrI2(Eu) crystals. Comparative gamma spectra acquired with LaBr3(Ce) and NaI(Tl) quantitatively depict the value of the high resolution and low intrinsic radioactivity of SrI2(Eu) in discriminating closely spaced gamma lines for radioisotope identification applications.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL work for others
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1055063
• Country of Publication: United States
• Language: English