检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:吴和喜[1,2,3] 葛良全[3] 罗耀耀[3] 刘义保[1,2] 余飞[2]
机构地区:[1]东华理工大学核技术应用教育部工程研究中心,南昌330013 [2]东华理工大学核科学与工程学院,南昌330013 [3]成都理工大学,成都610059
出 处:《核技术》2016年第11期21-26,共6页Nuclear Techniques
基 金:国家自然科学基金(No.11505027;No.11665001;No.41604116);核技术应用教育部工程研究中心基金(No.HJSJYB2014-7&8)资助~~
摘 要:在天然辐射环境下,无法找到仅含单一天然放射性系列的近似无限大地层用于获取航空γ谱仪的响应谱,这是导致无法利用最小二乘法解析航空γ能谱的关键问题所在。本文基于介质互换原理、地层模块化与分能区多次模拟的思想,通过构建Monte Carlo组合模型,从而获得了含不同放射性物质的任意形状地层上空航空γ谱仪的响应谱。依据航空γ能谱测点上γ辐射来源与石家庄动态带分析,建立了一套可靠的最小二乘法航空γ能谱解析模型。通过对野外10 km测线分析发现,当地层含量大于4×10^(-6)时,该方法与标准方法分析结果相当。同时该方法为人工放射性核素响应谱的剥离提供参考。Background: It is difficult to establish the least square method for parsing airborne gamma-ray spectrum because the approximately infinite stratum does not exist when it contains only 235U and 238U series, 232Th series or 40K. Purpose: This study aims to acquire the response spectrum of airborne gamma-ray spectrometry (AGS) by Monte Carlo simulation and establish the above-described method. Methods: Based on the principle of media interchange, the basic thought of modular stratum and energy partitioning for characteristic gamma-ray, the combination model is used to obtain the AGS' response spectrum of any shape of stratum by Monte Carlo simulation. And the least square model for solving airborne gamma-ray spectrum is established by the above response spectrum. Results: The corrected model of eU, eTh and 40K content in stratum is acquired by analyzing the eight airborne gamma-ray spectra from the dynamic scale model in Shijiazhuang City. The calculation values of 10 km survey lines coincide with the specification for AGS when the content of natural radioactivity nuclide is larger than 4×10-6. Conclusion: The results verify that the calculation model is a valid analytical technique of AGS for natural radioactivity nuclide in stratum. And it provides a valid method to acquire the AGS' response spectrum of artificial radioactivity nuclide.
关 键 词:航空γ谱仪 MONTE CARLO模拟 最小二乘法
分 类 号:TL817.2[核科学技术—核技术及应用]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.249