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  • [Appl Radiat Isot.] Performance of a virtual frisch-grid CdZnTe detector for prompt γ-ray induced by 14 MeV neutrons: Monte Carlo simulation study.

    고려대 / 이태웅, 이원호*

  • 출처
    Appl Radiat Isot.
  • 등재일
    2019 Nov
  • 저널이슈번호
    153:108818. doi: 10.1016/j.apradiso.2019.108818. Epub 2019 Jul 20.
  • 내용

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    Abstract
    The performance of a virtual (6 × 6 × 15 mm3) Frisch-grid cadmium zinc telluride detector for the detection of contraband with 14 MeV neutron-activation prompt γ-rays was studied using Monte Carlo simulations. A sensitive nonlinear iterative peak clipping algorithm was applied to the spectra to rapidly and easily identify the prompt γ-ray peaks. This algorithm showed better performance than directly using the original spectra. The CZT detector showed good energy resolution for the high energy prompt γ-rays and its carbon-to-oxygen peak ratios were almost equal to the theoretical value of the target contraband materials. The minimum detectable concentration of carbon and oxygen elements using the CZT detector was calculated. The simulation results for the CZT detector were compared to those of a HPGe detector and demonstrated the feasibility of using a CZT detector in neutron activation analysis.

     


    Author information

    Lee T1, Kim Y2, Jo A2, Kim J3, Lee W4.
    1
    Global Institute of Technology, KEPCO KPS, Munhwa-ro 211, Jeollanam-do, 58326, South Korea.
    2
    Department of Bio-convergence Engineering, Korea University, Anam-ro 145, Seoul 02841, South Korea.
    3
    Korea Institute of Radiologic and Medical Sciences, Nowon-ro 75, Seoul, 01812, South Korea.
    4
    School of Health and Environmental Science, Korea University, Anam-ro 145, Seoul, 02841, South Korea. Electronic address: wonhol@korea.ac.kr.

  • 키워드
    Detection of contraband materials; Minimum detectable concentration (MDC); Prompt γ-ray neutron activation analysis (PGNAA); Sensitive nonlinear iterative peak clipping algorithm (SNIP); Virtual frisc
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