【作者】 沈正新； 倪卫冲； 胡明考；

【Author】 SHEN Zheng-xin;NI Wei-chong;HU Ming-kao;Airborne Survey and Remote Sensing Center of Nuclear Industry;

【机构】 核工业航测遥感中心；

【摘要】 本文选择了就地HPGe谱仪、高压电离室测量和地面取样分析三种地面测量方法,对辐射环境航空测量结果进行地面验证。分析空地测量结果的相对偏差以及引起的原因。结果表明辐射环境航空测量能快速有效的评价空气吸收剂量率,相对偏差一般在±20%以内;对人工核素的污染水平和分布范围,航空测量给出的信息是可靠的,由于地表土壤中沉积的人工核素在纵向和横向分布的不均匀性,航测给出的结果是地面较大范围的平均贡献,而地面测量范围小,造成两者测量结果存在差异,相对偏差一般在±40%以内。更多还原

【Abstract】 This paper applied three ground methods to analysis the airborne measurement data,including in-situ HPGe instrument,high-voltage ionization chamber and sampling.The relative deviation and its reasons will be analyzed between the air and the ground.The results indicate that it is quick and effective to define the absorbed dose rate in the air by the use of airborne gamma ray date.The relative deviation is less than ± 20%in general.It is reliable to define the pollution level and distribution for artificial radionuclide by the airborne data.The vertical and horizontal distribution of artificial radionuclide at the soil is not uniform.The covered area by in-suit measurement is small but the airborne controlled a large area.Those cause the difference of the result.The relative deviation is less than ± 40%in general.更多还原