The absorption factor in counting alpha rays from thick mineral sources
The absorption factor in counting alpha rays from thick mineral sources
复制标题
计算来自厚矿物源的 α 射线的吸收系数
DOI：
10.1029/tr029i003p00335
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发表时间：
1948
期刊：
影响因子：
--
通讯作者：
P. Hurley
中科院分区：
文献类型：
--
作者：
H. H. Nogami;P. Hurley
从已知铀和钍含量的矿物和岩石的一层厚厚的粉末样品中测量到的总α发射与根据与构成源的元素原子量的平方根成比例的源吸收对样品的预测发射非常吻合。因此，对大多数矿物和岩石中的铀钍组合的测量可以通过简单地计数样品厚层上的α射线和应用适当的吸收因子来完成。描述了特别适用于普通岩石活动范围的计数设备，该设备将计数源平面以上发射的剩余范围大于指定量的所有阿尔法，因此不需要校准。
The total measured alpha emission from a thick layer of powdered sample of each of a number of minerals and rocks of known uranium and thorium content agreed well with the emission predicted for the samples on the basis of a source absorption proportional to the square root of the atomic weight of the elements comprising the source. Thus, the measurement of combined uranium and thorium in most minerals and rocks may be made by the simple count of alpha rays above a thick layer of the sample, and the application of the appropriate absorption factor. Counting equipment particularly suitable for the range of activity of common rocks is described which will count all of the alphas emitted above the plane of the source having a residual range greater than a specified amount, thus requiring no calibration.