摘要
积分实验是检验评价中子核数据可靠性和精准度的重要手段,效应/本底比是衡量积分实验数据品质的重要参数。为了获得更高的效应/本底比,对中国原子能科学研究院积分实验使用的前级准直系统进行了设计,该系统主要由前级准直器和阴影锥组成。利用MCNP-4C程序对不同条件下的本底谱进行了模拟,结果显示,加上前级准直系统之后,效应/本底比有非常明显的改善。
Benchmark experiment is an important means to inspect the reliability and accuracy of the evaluated nuclear data, the effect/background ratios are the important parameters to weight the quality of experimental data. In order to obtain higher effect/background ratios, a pre-collimator system was designed for benchmark experiment. This system mainly consists of a pre-collimator and a shadow cone. The MCNP-4C code was used to simulate the background spectra under various conditions, from the results we found that with the pre-collimator system have a very marked improvement in the effect / background ratios.
出处
《核技术》
CAS
CSCD
北大核心
2013年第1期6-11,共6页
Nuclear Techniques
基金
湖南省教育厅重点基金项目(10A106)
