低能γ射线谱测量岩性技术的初步研究

An elementary study of low energy γ-ray spectrum surveying technology

在分析野外地面γ射线谱的基础上,详细论述了低能γ射线谱及其与介质有效原子序数、岩性之间的关系。研究发现,不同地层、不同岩性的天然γ射线低能谱峰形态存在差异,主要表现在野外γ射线低能峰的峰位和低能峰前后两翼形状方面。据此,针对传统的野外γ射线能谱测量未能利用低能γ射线谱的问题,提出了一种利用低能γ射线谱段区分岩性的方法。

The low energy γ-ray spectrum is described in detail on the basis of analyzing the field full γ spectrum. The relationship is discussed between low energy γ spectrum and effective atomic number of rocks. Since there are differences in the position and shape of the low energy spectrum for different rocks, the lithology of rocks can be differentiated by means of measuring the low energy gamma ray spectrum.