BS EN ISO 8769:2022 Measurement of radioactivity. Alpha-, beta- and photon emitting radionuclides. Reference measurement standard specifications for the calibration of surface contamination monitors
1 Scope
This document specifies the characteristics of reference measurement standards of
radioactive surface contamination, traceable to national measurement standards, for
the calibration of surface contamination monitors. This document relates to alpha-emitters,
beta-emitters, and photon emitters of maximum photon energy not greater than 1,5 MeV.
It does not describe the procedures involved in the use of these reference measurement
standards for the calibration of surface contamination monitors. Such procedures are
specified in IEC 60325 [ 6 ] , IEC 62363 [ 7 ] , and other documents.
NOTE Since some of the proposed photon standards include filters, the photon standards
are to be regarded as reference measurement standards of photons of a particular energy
range and not as reference measurement standards of a particular radionuclide. For
example, a 241 Am source with the recommended filtration does not emit from the surface the alpha
particles or characteristic low-energy L X-ray photons associated with the decay of
the nuclide. It is designed to be a reference measurement standard that emits photons
with an average energy of approximately 60 keV.
This document also specifies preferred reference radiations for the calibration of
surface contamination monitors. These reference radiations are realized in the form
of adequately characterized large area sources specified, without exception, in terms
of surface emission rate and activity which are traceable to national standards.
BS EN ISO 8769:2022 history
2023BS EN ISO 8769:2022 Measurement of radioactivity. Alpha-, beta- and photon emitting radionuclides. Reference measurement standard specifications for the calibration of surface contamination monitors