IEC 62372-2021 pdf free.Nuclear instrumentation – Housed scintillators – Test methods of light output and intrinsic resolution.
This document is applicable to housed scintillators for registration and spectrometry of alpha-, beta-, gamma-, X-ray and neutron radiation.
The main parameters, such as a light output and intrinsic resolution are established. This document specifies the requirements for the testing equipment and test methods of the basic parameters of housed scintillators, such as:
• the direct method is applicable to measure the light output of housed scintillators based on scintillation material. The housed scintillators certified by this method can be used as working standard of housed scintillators (hereinafter: working standard) when performing measurements by a relative method of comparison.
• the relative method of comparison with the working standard is applicable to housed scintillators based on the same scintillation material as the working standard.
This document does not apply to gas or liquid scintillators and scintillators for counting and current modes.
The numerical values of the parameters are set to the specific type of scintillators in the specifications.
2 NormatIve references
There are no normative references in this document.
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org!
• ISO Online browsing platform: available at http://www.iso.org/obp
4.1 General
4.1.1 Test conditions
Measurements shall be made under normal conditions, unless otherwise specified in the specifications of the manufacturer of housed scintillators.
Measurements should start at least 0,5 h after the last device has been switched on, unless otherwise specified by the manufacturer specifications.
Before measuring, the housed scintillator and the PMT is kept under high voltage for the time necessary for getting to the operation condition. Before measuring, the PMT is kept under high voltage for the time necessary for getting to the operation condition.
All parameters are measured during the complete blackout of the housed scintillator and PMT.
Optical contact between the housed scintillator and the PMT is provided by the material specified in the manufacturer specifications of the housed scintillator.
For the measuring, the following condition of choosing PMT should be reached: the working part of the photocathode shall overlap the output window of the scintillator.
It is allowed to apply a light guide or an assembly of several PMT, if technical characteristics and use conditions of light guide or assembly are specified in the specifications.
The measured housed scintillator is mounted on the PMT photocathode by optical contact, unless otherwise is specified in the manufacturer’s specifications.
It is allowed to place a source of ionizing radiation inside the light protective chamber.IEC 62372 pdf free download.