Hivatkozási szám

MSZ EN ISO 10703:2016

Dokumentumazonosító

162371

Cím

Vízminőség. Radionuklidok aktivitáskoncentrációjának meghatározása. Nagy felbontású gamma-spektrometria (ISO 10703:2007)

Angol cím

Water quality. Determination of the activity concentration of radionuclides. Method by high resolution gamma-ray spectrometry (ISO 10703:2007)

Alkalmazási terület

This International Standard specifies a method for the simultaneous determination of the activity concentration of various radionuclides emitting gamma rays with energies 40 keV < E < 2 MeV in water samples, by gamma-ray spectrometry using germanium detectors with high energy resolution in combination with a multichannel analyser. NOTE The determination of the activity concentration of radionuclides emitting gamma rays with energy below 40 keV and above 2 MeV is also possible within the scope of this International Standard, provided both the calibration of the measuring system and the shielding are adapted to this purpose. This International Standard includes the procedures for energy calibration, determination of the energy dependent sensitivity of the measuring system, the analysis of the spectra and the determination of the activity concentration of the various radionuclides in the sample studied. It is only applicable to homogeneous samples. Samples with activities typically between 1 Bq and 104 Bq can be measured as such, i.e. without dilution or concentration of the sample or special (electronic) devices. Depending on different factors, such as the energy of the gamma rays and the emission probability per nuclear disintegration, the size and geometry of the sample and the detector, the shielding, the counting time and other experimental parameters, the sample should be concentrated by evaporation when activities below about 1 Bq have to be measured. Also, when the activity is considerably higher than 104 Bq, the sample should be either diluted or an aliquot of the sample should be taken or the source to detector distance should be increased, or a correction for pile-up effects should be applied.

ICS

13.060.60 Víz fizikai tulajdonságainak vizsgálata

17.240 Sugárzásmérések

Műszaki Bizottság

A szabvány nyelve

angol

Az érvényesség kezdete

2016-03-01

A visszavonás napja

2021-11-01

Forrás

idt EN ISO 10703:2015; idt ISO 10703:2007

Előd

Utód

MSZ EN ISO 10703:2021

Módosítás

Kiegészítő információk

SZK-közlemények

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