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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Background: Simultaneous detection of neutrons and gamma rays have become much more practicable, by taking advantage of good gamma-ray discrimination properties using pulse shape discrimination (PSD) technique. Recently, we introduced a commercial CLYC system in Korea, and performed an initial characterization and simulation studies for the CLYC detector system to provide references for the future implementation of the dual-mode scintillator system in various studies and applications. Materials and Methods: We evaluated a CLYC detector with 95% $^6Li$ enrichment using various gamma-ray sources and a $^{252}Cf$ neutron source, with validation of our Monte Carlo simulation results via measurement experiments. Absolute full-energy peak efficiency values were calculated for gamma-ray sources and neutron source using MCNP6 and compared with measurement experiments of the calibration sources. In addition, behavioral characteristics of neutrons were validated by comparing simulations and experiments on neutron moderation with various polyethylene (PE) moderator thicknesses. Results and Discussion: Both results showed good agreements in overall characteristics of the gamma and neutron detection efficiencies, with consistent ~20% discrepancy. Furthermore, moderation of neutrons emitted from $^{252}Cf$ showed similarities between the simulation and the experiment, in terms of their relative ratios depending on the thickness of the PE moderator. Conclusion: A CLYC detector system was characterized for its energy resolution and detection efficiency, and Monte Carlo simulations on the detector system was validated experimentally. Validation of the simulation results in overall trend of the CLYC detector behavior will provide the fundamental basis and validity of follow-up Monte Carlo simulation studies for the development of our dual-particle imager using a rotational modulation collimator.
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참고문헌 (12)
참고문헌 신청
Glodo J / 2008 / Scintillation properties of 1 inch Cs2LiYCl6:Ce crystals / IEEE Trans. Nucl. Sci 55(3):1206~1209
Glodo J / 2012 / Pulse shape discrimination with selected elpasolite crystals / IEEE Trans. Nucl. Sci 59(5):2328~2333
Glodo J / 2013 / Development of Cs2LiYCl6 scintillator / J. Cryst. Growth 379:73~78
Smith MB / 2013 / Fast neutron spectroscopy using Cs2LiYCl6:Ce (CLYC) scintillator / IEEE Trans. Nucl. Sci 60(2):855~859
Pelowitz DB. / 2013 / MCNP6TM user's manual version 1.0 :195~210
Glodo J / 2012 / Pulse shape discrimination with selected elpasolite crystals / IEEE Trans. Nucl. Sci 59(5):2328~2333
Glodo J / 2013 / Development of Cs2LiYCl6 scintillator / J. Cryst. Growth 379:73~78
Smith MB / 2013 / Fast neutron spectroscopy using Cs2LiYCl6:Ce (CLYC) scintillator / IEEE Trans. Nucl. Sci 60(2):855~859
Pelowitz DB. / 2013 / MCNP6TM user's manual version 1.0 :195~210
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