高精度放射性测量及其应用

在核技术测量扩大应用的领域中,野外放射性测量发现的许多有意义的异常多表现为低值异常。作者为低值异常的测量提出高精度放射性测量。文章首先为提高测量这些低值异常的可靠性,指出必须重视提高野外测量(主要对地面γ总量和γ能谱测量)精度的措施,如选择合适的测量仪器和测量时间,控制和减少野外测量的干扰因素等。其次,数据处理是微弱异常解释的关键环节之一。文中简述了目前确定微弱放射性异常的几个常见方法,以及用γ能谱数据寻找非放射性元素的数据处理方法。文章第三部分概括了野外放射性测量技术用于找金、找石油、找地下水源以及解决工程地质问题和寻找其它金属矿产等方面的应用。

HIGH-PRECISION RADIOMETRIC SURVEY AND ITS APPLICATION

In the field where nuclear survey is comparatively extensively applied, many valuable anomalies detected by field radiometric survey are weak or low-value anomalies. For these low-value anomalies, the authors suggest the utiliza tion of high-precision radiometric survey. In order to raise the reliability oi the determination of these low-value anomalies, the paper points out that impor tance should be attached to the measures for raising the precision of field survey (mainly the surface total gamma amount and gamma spectrometry), which include, for example, the selection of proper instruments and time of measurement, and the control and reduction of interference factors in field survey. Besides, the data-processing is the key-link in the interpretation of weak anomalies. The paper describes briefly some currently-used common methods for determining weak radioactive anomalies and the data-processing method in search for nonradioactive elements by means of data from gamma spectrometry. The third part of the paper outlines the application of field radio-metric technique to the prospecting for gold, petroleum, groundwater sources and other important metallic ore resources and to the solution of problems in the aspect of engineering geology.