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https://doi.org/10.3938/NPSM.69.625
Characteristics of Beta-ray Measurements of Plastic Scintillators Containing Gd$_2$O$_3$ or CdTe
New Phys.: Sae Mulli 2019; 69: 625~630
Published online June 28, 2019;  https://doi.org/10.3938/NPSM.69.625
© 2019 New Physics: Sae Mulli.

Jong Soo NAM1, Sang Bum HONG2, Bum Kyung SEO2, Yong Uhn KIM3*

1Department of Physics, ChungBuk National University, Cheongju 28644, Korea / Korea Atomic Energy Research Institute, Daejeon 34057, Korea
2Korea Atomic Energy Research Institute, Daejeon 34057, Korea
3Department of Physics, ChungBuk National University, Cheongju 28644, Korea
Correspondence to: yukim@chungbuk.ac.kr
Received April 8, 2019; Revised May 14, 2019; Accepted May 17, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
In order to determine the decontamination that is necessary to reuse sites contaminated with radioactive materials, the use of scintillation counters to measure beta radiation in the field is essential. We fabricated a casting detector by adding Gd$_2$O$_3$ or CdTe to a commercial organic scintillation material (0.20 PPO : 0.01 POPOP (wt%)). The transmittance of the scintillator with CdTe added was not significantly changed by the amount of added CdTe, but the transmittance of the scintillator with Gd$_2$O$_3$ added showed a large variation with the amount added. The scintillator with CdTe added had better transmittance than the conventional scintillator. Also, the spectra of $^{90}$Sr radiation source and background could be clearly distinguished. In addition, the detection efficiency of the plastic scintillators with CdTe was much higher than that of plastic scintillators without CdTe. Among the plastic scintillators with different concentrations of CdTe, the characteristics of the plastic scintillators with CdTe of 0.10 (wt%) were prominent. A large-scale plastic scintillator with CdTe (0.10 wt%) may be useful for assessing $^{90}$Sr contamination levels at sites contaminated by radioactive materials.
PACS numbers: 29.40.Mc
Keywords: Plastic scintillator, Organic scintillation material, Compound


June 2019, 69 (6)
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