ISO 4037-4:2019 标准是辐射防护领域的重要标准之一，它规定了用于校准剂量计和剂量率计以及确定它们响应光子能量函数的X和γ参考辐射的要求。本标准适用于低能X射线场中的个人和区域剂量计的校准。本标准还规定了用于校准个人和区域剂量计的低能X参考辐射的特性。

本标准的主要内容包括以下几个方面：

1. 标准适用范围：本标准适用于低能X射线场中的个人和区域剂量计的校准。

2. 校准方法：本标准规定了用于校准个人和区域剂量计的低能X参考辐射的特性。校准方法包括使用标准源和校准装置进行校准。

3. 校准要求：本标准规定了个人和区域剂量计在低能X参考辐射场中的校准要求。校准要求包括剂量响应、能量响应、方向响应等。

4. 校准不确定度：本标准规定了个人和区域剂量计在低能X参考辐射场中的校准不确定度要求。校准不确定度包括剂量响应不确定度、能量响应不确定度、方向响应不确定度等。

5. 校准报告：本标准规定了个人和区域剂量计在低能X参考辐射场中的校准报告要求。校准报告应包括校准日期、校准装置、校准源、校准结果等信息。

本标准的实施可以保证个人和区域剂量计在低能X参考辐射场中的准确性和可靠性，为辐射防护提供了重要的技术支持。

相关标准
- ISO 4037-1:2019 Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 1: Radiation characteristics and production methods
- ISO 4037-2:2019 Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 2: Dosimetry for radiation protection over the energy ranges from 8 keV to 1,3 MeV and 4 MeV to 9 MeV
- ISO 4037-3:2019 Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence
- ISO 4037-5:2019 Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 5: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence for protection against radon exposure
- ISO 14146:2017 Radiation protection — Sealed radioactive sources — General requirements and classification