The variation of scattered x-rays with density in an irradiated body.
The variation of scattered x-rays with density in an irradiated body.
复制标题
受照射体内散射 X 射线随密度的变化。
DOI：
10.1088/0031-9155/1/4/305
复制
发表时间：
1957
影响因子：
3.5
通讯作者：
J. E. O'Connor
中科院分区：
文献类型：
--
作者：
J. E. O'Connor
它表明，提供的有效原子序数保持不变，有一个一般的散射与密度的变化和系统的几何形状的变化之间的关系。本文提出了一种简化的分析方法，计算了等效水体中散射的贡献。通过对半值层厚度为1.5mm铜的辐射实验，得到了水等效材料中相对散射吸收因子的数值。应用物体密度与系统几何形状之间的一般关系，导出了非单位密度物体的相对散射吸收因子值。这些值可用于计算输送到位于非均匀体内的点的散射剂量。所获得的结果的实际意义进行了讨论，特别是参考使用的过境剂量技术。
It is shown that, provided the effective atomic number remains constant, there is a general relationship between the variation of scatter with density and the variation with geometry of the system. A simplified analysis of the scatter contribution in water equivalent bodies is presented. This analysis leads to the definition of relative scatter absorption factors and the values of these factors in water equivalent materials are found by experiment for radiation with a half-value layer of 1·5 mm Cu. By the application of the general relationship between density of the body and geometry of the system values of the relative scatter absorption factors in bodies of other than unit density are deduced. These values may be employed in the calculation of the scatter dose delivered to points which lie in an inhomogeneous body. The practical importance of the results obtained is discussed with particular reference to the use of Transit Dose techniques.