世界核地质科学2024，Vol.41Issue(4)：720-731,12.DOI:10.3969/j.issn.1672-0636.2024.04.008
便携天然放射性模型组合系统均匀性辐射特征
Radiation uniformity characteristics of portable natural radioactivity pad system
摘要
Abstract
The break throng of uranium exploration in new areas,new horizons and new types has accelerated the application of drone aerial radioactivity measurement technology,and brings out the demand for on-site calibration of Unmanned aerial γ spectrometer.The traditional"Airborne Radioactivity Measurement Model Standard Device"fixed at the airport is not suitable for on-site calibration,a portable standard device is need to be developed to carry according to the characteristics of Unmanned aerial γ spectrometer.The"portable natural radioactive combination pad system"was developed in this research.To get the uniformity of the gamma radiation field generated by the combination,we tested the vertical and horizontal radiation characteristics of the natural radiation field formed by placing six small pad combinations.The results showed that within the range of 50～120 cm above the center of the radiation field,the radiation field changes of the MAP-U,MAP-Th,and Map-M pads were within 5%.The MAP-K pad had a significant change due to the limitations of natural potassium content and detector sensitivity to 40K,but its vertical radiation field was uniform;The horizontal direction presents a uniform scattering distribution with the center as the origin:compared to the central position,the variation within the range of 100 cm×100 cm was approximately within 5%;200 cm×200 cm,20%;300 cm×300 cm,35%.Its radiation characteristics meet the uniformity requirements in relevant calibration specifications and can be used for the calibration of large vehicle/airborne radiometric systems.关键词
天然放射性模型系统/垂向及水平方向/辐射特征/均匀性Key words
natural radioactivity combination pad system/vertical and horizontal directions/radiation characteristics/uniformity分类
天文与地球科学引用本文复制引用
周宗杰,高国林,杜晓立,杜一滨,武成,张岩..便携天然放射性模型组合系统均匀性辐射特征[J].世界核地质科学,2024,41(4):720-731,12.基金项目
中核集团集中研发项目(编号:物SD03-01)资助 Supported by China National Nuclear Corporation(No.物SD03-01) （编号:物SD03-01）
