| 海底原位PGNAA探测含水率对中子分布影响研究 |
| |
| 引用本文： | 徐阳,张庆贤,葛良全,张罡,白海涛,赵剑锟. 海底原位PGNAA探测含水率对中子分布影响研究[J]. 核电子学与探测技术, 2017, 37(4) |
| |
| 作者姓名： | 徐阳 张庆贤 葛良全 张罡 白海涛 赵剑锟 |
| |
| 作者单位： | 成都理工大学地学核技术四川省重点实验室,成都,610059 |
| |
| 基金项目： | 国家自然科学基金，四川省科技支撑计划项目 |
| |
| 摘 要： | 运用MC法模拟14 MeV快中子进入沉积物后的物理过程,得到了不同深度下沉积物中子能谱分布,分析了0~1 eV中子在沉积物中横、纵向分布规律以及含水率与Cl~-浓度对中子分布的影响,探讨了模拟条件下0~1 eV中子扩散的最大深度范围。结果表明:沉积物含水率对中子能谱分布和0~1 eV中子横、纵向分布均有显著影响,进行中子活化的最佳深度为2 cm处;0~1 eV中子扩散的最大深度范围为20~40 cm;海水中Cl~-浓度对中子吸收有影响但影响不显著。
|
| 关 键 词： | PGNAA 原位测量 海底沉积物 MC模拟 中子分布 |
Research of the Effect of Water Content on the Distribution of Neutron by Using PGNAA for In - Situ Measurement |
| |
| XU Yang,ZHANG Qing-xian,GE Liang-quan,ZHANG Gang,BAI Hai-tao,ZHAO Jian-kun. Research of the Effect of Water Content on the Distribution of Neutron by Using PGNAA for In - Situ Measurement[J]. Nuclear Electronics & Detection Technology, 2017, 37(4) |
| |
| Authors: | XU Yang ZHANG Qing-xian GE Liang-quan ZHANG Gang BAI Hai-tao ZHAO Jian-kun |
| |
| Abstract: | Monte Carlo method was used to simulate the physical process of 14 MeV fast neutrons after entering the sediments. The work obtained the neutron spectrums in different depths and the distribution of 0～1 eV neutrons in sediments, the influence of water contents and concentration of Cl-on the distribution was analyzed and the range of maximum depth of 0～1 eV neutrons diffusion was discussed. The results show that water content has a significant influence on neutron energy spectrums, and the transverse and longitudinal distribution of 0～1 eV neutrons can also be affected. The optimum depth of neutron activation is 2 cm and the range of maximum depth of 0 ～ 1 eV neutrons diffusion is 20 cm ～ 40 cm. The concentration of Cl-in sea water has influence on neutron absorption, but the influence is not significant. |
| |
| Keywords: | PGNAA in - situ measurement submarine sediment Monte Carlo simulation neutron distribution |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
