ISO 11929系列规定了电离辐射计量领域的一个程序 计算“判决阈值”、“检测极限”和“覆盖区间极限” 预选时间计数测量时的非负电离辐射测量 或者进行计数。测量结果来自总计数率和背景计数率 以及基于评估模型的进一步数量。特别是被测量的 净计数率可以是总计数率和背景计数率之差，或者 样品的净活度。它还可能受到测量系统校准、样本的影响 治疗和其他因素。购买本文件时可获得的所有当前修订均包含在购买本文件中。

The ISO 11929 series specifies a procedure, in the field of ionizing radiation metrology, for the calculation of the "decision threshold", the "detection limit" and the "limits of the coverage interval" for a non-negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors.All current amendments available at time of purchase are included with the purchase of this document.