核事故沾染的放射性区域所产生的地表活度分布与空中辐射场之间的换算规律--反卷积定理在核事故辐射场航测中的应用

本文应用卷积定理和反卷积定理解决了长期以来存在的任意面状放射源产生的辐射场求解问题.在核事故产生的放射性沾染区,根据本文介绍的方法,利用航空测量的某一高度平面上的照射量分布值,应用反卷积定理可求得地面上对应的放射性活度的分布,利用卷积定理可求得该活度分布所对应的任一高度平面上的照射量分布值.因该方法采用了FFT算法,故计算速度很快,可用于实时测量处理.

Calculation of radioactive field in nuclear contaminated area from data acquired in aerial survey

According to the convolution theorem and the dec onvolution theorem published recently, this paper resolves a problem that is how to measure radiative field produced by some plane active deposit with the aerial gamma-ray survey. In this new method, firstly, a series of radiative field data in some height have been detected by means of aerial survey, secondly, the corresponding data in the ground can be computed by the deconvolution theorem,finally, the data in anywhere height may be computed with convolution theorem. Since the FFT arithmetic is used, the computing velocity is very high,so that this method may be used in required quickly measurement