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A Study of the Inorganic Scintillator Properties for a Phoswich Detector  

Lee, Woo-Gyo (Korea Atomic Energy Research Institute)
Kim, Yong-Kyun (Korea Atomic Energy Research Institute)
Kim, Jong-Kyung (Dept. of Nucelar Engineering, Hanyang University)
Tarasov, V. (STC Institute for Single Crystals of National Academy of Science)
Zelenskaya, O. (STC Institute for Single Crystals of National Academy of Science)
Publication Information
Journal of Radiation Protection and Research / v.29, no.4, 2004 , pp. 251-256 More about this Journal
Abstract
CsI(Tl), $CdWO_4(CWO),\;Bi_4Ge_3O_{12}(BGO)\;and\;Gd_2SiO_5:Ce(GSO)$ scintillators were studied to manufacture a phoswich detector. The maximum wavelengths of the CsI(Tl), CWO, BGO and GSO scintillators are 550 nm, 475 nm, 490 nm and 440 nm for the radioluminescence, and the absolute light outputs of the CsI(Tl), CWO, BGO and GSO scintillators are 54890 phonon/MeV, 17762 phonon/MeV, 8322 phonon/MeV and 8932 phonon/MeV with a neutral filter, and the decay time of the CsI(Tl), CWO, BGO and GSO scintillators is $1.3{\mu}s,\;8.17{\mu}s$, 213 ns and 37 ns by a single photon method. The phoswich detector which was manufactured with plastic and CsI(Tl) scintillators could separate the ${\beta}$ particle and ${\gamma}$ ray. The phoswich detector could also measure the pulse height spectra of the ${\beta}$ particle and ${\gamma}$ ray by a PSD method.
Keywords
phoswich; inorganic scintillator; PSD(pulse shape discriminator); decay time; absolute light output;
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