Title :
Instrument Development and Gamma Spectroscopy With Strontium Iodide
Author :
Cherepy, Nerine J. ; Payne, Stephen A. ; Sturm, B.W. ; Drury, O.B. ; O´Neal, S.P. ; Thelin, P.A. ; Shah, K.S. ; Hawrami, R. ; Momayezi, M. ; Hurst, B. ; Burger, A. ; Wiggins, B. ; Bhattacharya, Pallab ; Boatner, L.A. ; Ramey, J.O.
Author_Institution :
Lawrence Livermore Nat. Lab., Livermore, CA, USA
Abstract :
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 equivalent 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 of SrI2(Eu) in discriminating closely spaced gamma lines for radioisotope identification applications.
Keywords :
crystal growth; gamma-ray spectra; gamma-ray spectroscopy; nuclear electronics; radioisotopes; readout electronics; solid scintillation detectors; LaBr3(Ce); NaI(Tl); SrI2(Eu) crystal; cerium-doped lanthanum bromide; crystal growth; digital readout method; energy resolution; equivalent size; europium-doped strontium iodide scintillator; gamma lines; gamma spectra; gamma spectroscopy; instrument development; large volume SrI2(Eu) crystals; radioisotope identification applications; readout methodology; standard analog readout; Absorption; Crystals; Detectors; Energy resolution; Laboratories; Spectroscopy; Strontium; Gamma-ray spectroscopy; scintillators; strontium iodide;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2012.2227796
