BS ISO 8769:2020,Measurement of radioactivity – Alpha-, beta- and photon emitting radionuclides – Reference measurement standard specifications for the calibration of surface contamination monitors.BS ISO 8769:2020 pdf free download.
ISO 8769:2020 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 241Am 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.
BS ISO 8769:2020 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.
The derivation of appropriate calibration factors in terms of activity is therefore a highly complex process which is outside the scope of this document. Appropriate guidance on this process is addressed in ISO 7503 (all parts).However, some estimate of the activity of the calibration measurement standard is required for general radiological safety purposes such as handling, leak testing, shielding, packaging, and transport. This is a generic issue for all radioactive sources regardless of their intended use and is not therefore addressed specifically in this document.
Traceability of calibration measurement standards to International Standards or national standards is established by a system of reference transfer instruments.
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 emitter of maximum photon energy not greater than 1, 5 MeV.
PS：
The decompression password of this package: www.freestandardsdownload.com
