IEC 62372:2021 PDF

Overview - IEC 62372:2021 (Housed scintillators, light output & intrinsic resolution)

IEC 62372:2021 is an international standard for nuclear instrumentation that defines test methods and equipment requirements for housed scintillators used in registration and spectrometry of alpha-, beta-, gamma-, X‑ray and neutron radiation. This second edition (2021) cancels and replaces the 2006 edition and updates terminology, definitions and references. It applies to solid/liquid‑free housed scintillators (not gas or liquid scintillators, and not counting/current-mode detectors).

Key topics and technical requirements

• Scope of measurement: Establishes procedures to determine the basic parameters of housed scintillators - primarily light output and intrinsic resolution - under defined test conditions.
• Test methods:
  • Direct method for absolute measurement of light output of scintillation materials; results can certify a housed scintillator as a working standard.
  • Relative method of comparison using a working standard to measure other housed scintillators of the same scintillation material.
• Assembly and equipment: Defines requirements for the test assembly (housed scintillator, photomultiplier tube (PMT), PMT divider, shielding and optical coupling) and for radiation sources used during testing.
• Performance parameters and calculations: Covers determination of PMT spectrometric constant, full width at half maximum (FWHM) for total absorption peaks, nonlinearity, instability, and procedures for processing results and reporting expanded uncertainty and relative expanded uncertainty.
• Measurement practice: Includes guidance on measurement conditions, spectral matching, pulse‑height analysis, and extracting intrinsic resolution from detector energy resolution and PMT contributions.

Practical applications

• Calibration laboratories and manufacturers use IEC 62372:2021 to certify or compare housed scintillators intended for spectroscopy and radiation monitoring.
• Quality assurance teams use the standard to verify light output, energy resolution and stability of detector assemblies before deployment in environmental monitoring, nuclear industry, medical imaging adjuncts, emergency response, and research instrumentation.
• Metrology institutes use the direct method to produce working standards for intercomparisons and traceable measurements.

Who should use this standard

• Detector manufacturers and designers
• Calibration and testing laboratories
• Nuclear instrumentation engineers and metrologists
• Regulatory bodies and procurement specialists specifying performance criteria for scintillation detectors

Related standards and references

• Terminology referenced from IEC Electropedia and IEC 60050 series (e.g., IEC 60050-395).
• Users should consult other IEC/ISO guides on measurement uncertainty and radiological instrumentation where applicable.

Keywords: IEC 62372:2021, housed scintillators, light output, intrinsic resolution, nuclear instrumentation, test methods, photomultiplier, working standard, direct method, relative comparison.