WATER QUALITY - DETERMINATION OF THE ACTIVITY CONCENTRATION OF RADIONUCLIDES - METHOD BY HIGH RESOLUTION GAMMA-RAY SPECTROMETRY (FIRST REVISION) (ISO 10703:2007, IDT)
This Malaysian 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.
This Malaysian 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 det
