MCNP benchmark of a 252Cf source-based PGNAA system for bulk sample analysis

A MCNP model of a252Cf source-based prompt gamma-ray neutron activation analysis (PGNAA) system for bulk sample analysis was benchmarked. The indium foils activation and aqueous samples containing chlorine were measured using the PGNAA system, and the experimental data compared to the simulations. The discrepancies between the measurements and simulations are within 6% and 20% for thermal neutron flux and prompt gammaray response, respectively. The results show that the simulations agree well with the measurements, and demonstrate the proposed MCNP model can represent the system.

对一个用于块状样品分析的基于锎 - 252源的瞬发伽马中子活化分析（PGNAA）系统的MCNP模型进行了基准测试。使用PGNAA系统对铟箔活化以及含氯的水溶液样品进行了测量，并将实验数据与模拟结果进行了比较。对于热中子通量和瞬发伽马射线响应，测量值与模拟值之间的差异分别在6%和20%以内。结果表明，模拟结果与测量值吻合良好，并证明所提出的MCNP模型能够代表该系统。