TY - JOUR
AU - 
AB - Abstract. Strontium iodide doped with europium ( SrI 2 ( Eu 2 + ) ) is a new scintillator material being developed as an alternative to lanthanum bromide doped with cerium ( La Br 3 ( Ce 3 + ) ) for use in high-energy astrophysical detectors. As with all scintillators, the issue of nonproportionality is important because it affects the energy resolution of the detector. We investigate how the nonproportionality of SrI 2 ( Eu 2 + ) changes as a function of temperature from 16 to 60°C by heating the SrI 2 ( Eu 2 + ) scintillator separate from the photomultiplier tube. In a separate experiment, we also investigate the nonproportionality at high energies (up to 6 MeV) of SrI 2 ( Eu 2 + ) at a testing facility located at NASA Goddard Space Flight Center. We find that the nonproportionality increases nearly monotonically as the temperature of the SrI 2 ( Eu 2 + ) scintillator is increased, although there is evidence of nonmonotonic behavior near 40°C, perhaps due to electric charge carriers trapping in the material. We also find that within the energy range of 662 keV to 6.1 MeV, the change in the nonproportionality of SrI 2 ( Eu 2 + ) is ∼ 1.5 to 2%.
TI - Scintillation properties of strontium iodide doped with europium for high-energy astrophysical detectors: nonproportionality as a function of temperature and at high gamma-ray energies
JF - Journal of Astronomical Telescopes, Instruments, and Systems
DO - 10.1117/1.JATIS.1.1.016002
DA - 2015-01-01
UR - https://www.deepdyve.com/lp/spie/scintillation-properties-of-strontium-iodide-doped-with-europium-for-yASHS6dber
SP - 016002
EP - 016002
VL - 1
IS - 1
DP - DeepDyve
ER -