Earticle

초록

영어

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 252Cf 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 252Cf 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.

목차

ABSTRACT
 Introduction
 Materials and Methods
  1. Modeling of the CLYC Detector System
  2. Simulation and Experiments on the Gamma-ray Detection Efficiency
  3. Simulation and Experiments on the Neutron Moderation and the Detection Efficiency
 Results and Discussion
  1. Results on the Gamma-ray Detection Efficiency
  2. Results on the Neutron Moderation and the Detection Efficiency
 Conclusion
 Acknowledgements
 References

키워드

저자

• Hyun Suk Kim [ Program in Biomedical Radiation Sciences, Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea; Seoul National University Hospital, Seoul, Korea ]
• Martin B. Smith [ Bubble Technology Industries Inc., Chalk River, ON, Canada ]
• Martin R. Koslowsky [ Bubble Technology Industries Inc., Chalk River, ON, Canada ]
• Sung-Woo Kwak [ Policy and Technology Research Division, Korea Institute of Nuclear Nonproliferation And Control (KINAC), Daejeon, Korea ]
• Sung-Joon Ye [ Program in Biomedical Radiation Sciences, Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea; 2Seoul National University Hospital, Seoul, Korea; Advanced Institutes of Convergence Technology, Seoul National University, Suwon, Korea ]
• Geehyun Kim [ Department of Nuclear Engineering, Sejong University, Seoul, Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629