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KMID : 0364920040290040251
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Journal of Radiation Protection and Research
2004 Volume.29 No. 4 p.251 ~ p.256
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A Study of the Inorganic Scintillator Properties for a Phoswich Detector
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Lee Woo-Kyo
Kim Yong-kyun
Kim Jong-Kyung
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Abstract
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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.
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KEYWORD
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phoswich, inorganic scintillator, PSD(pulse shape discriminator), decay time, absolute light output
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