Lee Taewoong, Kim Younghak, Jo Ajin, Kim Jongguk, Lee Wonho
Global Institute of Technology, KEPCO KPS, Munhwa-ro 211, Jeollanam-do, 58326, South Korea.
Department of Bio-convergence Engineering, Korea University, Anam-ro 145, Seoul 02841, South Korea.
Appl Radiat Isot. 2019 Nov;153:108818. doi: 10.1016/j.apradiso.2019.108818. Epub 2019 Jul 20.
The performance of a virtual (6 × 6 × 15 mm) 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.
利用蒙特卡罗模拟研究了虚拟（6×6×15毫米）弗里施栅格碲锌镉探测器用于探测14兆电子伏中子活化瞬发γ射线违禁品的性能。将一种灵敏的非线性迭代峰值削波算法应用于光谱，以快速、轻松地识别瞬发γ射线峰。该算法表现出比直接使用原始光谱更好的性能。碲锌镉探测器对高能瞬发γ射线显示出良好的能量分辨率，其碳氧峰比几乎等于目标违禁品材料的理论值。计算了使用碲锌镉探测器时碳和氧元素的最低可探测浓度。将碲锌镉探测器的模拟结果与高纯锗探测器的结果进行了比较，证明了在中子活化分析中使用碲锌镉探测器的可行性。
