本标准规定了基于光谱学的入口监测器（SRPM）的操作和性能要求，这些监测器能够通过使用伽马光谱学技术检测放射性并识别可能存在于人员、车辆或容器中或其上的放射性核素。

This standard specifies the performance criteria and test methods for installed stationary spectroscopy-based radiation portal monitors (SRPMs) used for the detection and identification of gamma-emitting radioactive materials. SRPMs may also have the ability to detect neutron emitting sources. SRPMs are not designed to operate while in motion. Refer to IEEE Std N42.43-2021 [B4] for information regarding mobile radiation monitors. This standard does not address portal monitors that may have the ability to reduce the effects caused by the presence of naturally occurring radioactive material (NORM) without the ability to identify specific radionuclides. Monitors with this capability are addressed by ANSI N42.35 [B1]