Nuclear Engineering and Technology

  • 제53권4호
  • /
  • Pages.1311-1317
  • /
  • 2021
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  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Spectral resolution evaluation by MCNP simulation for airborne alpha detection system with a collimator

  • Kim, Min Ji (Nuclear Engineering, Ulsan National Institute of Science and Technology) ;
  • Sung, Si Hyeong (Nuclear Engineering, Ulsan National Institute of Science and Technology) ;
  • Kim, Hee Reyoung (Nuclear Engineering, Ulsan National Institute of Science and Technology)
  • 투고 : 2020.02.28
  • 심사 : 2020.09.14
  • 발행 : 2021.04.25
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초록

In this study, an airborne alpha detection system, which consists of a passivated implanted planar silicon (PIPS) detector and an air filter, was developed. A collimator applied to the alpha detection system showed an enhancement in resolution and a degradation in detection efficiency. The resolution and detection efficiency were compared and analyzed to evaluate the performance of the collimator. Thus, the resolution was found to be more important than the efficiency as a determining factor of the detection system performance, from the viewpoint of radionuclide identification. The performance was evaluated on three properties of the collimator: hole shape, hole length, and the ratio between the hole and frame pitches. From the hole shape performance evaluation, a hexagonal collimator showed the highest resolution. Further, the collimator with a hole pitch of 14 mm was found to have the highest resolution while that with a frame pitch of 4-6 mm (i.e., 1.2-1.4 times longer than the hole pitch) showed the highest resolution.

키워드

과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP: Ministry of Science, ICT and Future Planning) NRF-22A20153413555, This work was supported by the 'Development of Portable Radioactive Contamination Monitoring System for Alpha and Beta Dust Source in the Air' of the Korea Institute of Energy Technology Evaluation and Planning(KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20171510300590).

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