一种确定放射性烟羽边界的新方法

A new method for boundary determination of radioactive plume

根据航空γ场理论中Z量板等相关理论,提出了一种新型的放射性烟羽边界确定方法;并依据介质互换原理,在地面上利用矿体模型模拟烟羽(空气介质互换成河沙介质),进行实验模拟。实验结果表明,在实验室模拟情况下,空中异常半值点宽度从410m变化到602m,通过介质互换后用Z量板计算出的烟羽宽度与理论值之间的相对偏差在6.4%–8.9%范围内,误差较小,验证了此Z量板正确、有效,可用于实际航空测定放射性烟羽边界。

Based on the theory of airborne T-ray field, we propose a method was for determining boundary of radioactive plume. Under the medium exchange principle, mine-body models were used to simulate plume on the ground by air-sand exchange. The results show that, after the medium exchange, difference between the simulated and theoretical plume widths is small, with the relative deviations ranging from 6.4% to 8.9% for exceptional half width in the air （2z） from 410 m to 602 m. The method can be applied to boundary determination in airborne survey.