本标准用于测定锗半导体探测器的伽马射线效率，是在认识到伽马射线光谱法测量的大体积、低放射性样品越来越多的情况下制定的。当与相对效率测量标准ANSI/IEEE Std 325-1971（Reaff 1977）《锗伽马射线探测器测试程序》结合使用时，所述标准化样品几何结构和测量技术为探测器性能提供了有意义的评估。众所周知，许多马里内利烧杯的几何形状都在使用中。然而，本标准的目的是规定一种单一配置，其唯一目的是表征探测器性能。

This standard for determination of gamma-ray efficiencies of germanium semiconductor detectors was developed in recognition of the increasing number of large-volume, low-activity samples being measured by gamma-ray spectroscopy. The standardized sample geometry and measurement techniques described, when used in conjunction with the relative efficiency measurement standard ANSI/IEEE Std 325-1971 (Reaff 1977), Test Procedures for Germanium Gamma-Ray Detectors, provide a meaningful assessment of detector performance. It is recognized that many Marinelli beaker geometries are in use. However, the object of this standard is to specify a single configuration for the sole purpose of characterizing detector performance.