IEC 61563 pdf download.Radiation protection instrumentation – Equipment for measuring specific activity of gamma-emitting radionuclides in foodstuffs 1 Scope and object 1.1 Scope This International Standard applies to portable instruments used for measuring the specific or volumic activity of gamma-emitting radionuclides in food/foodstuffs intended for operation under field conditions, particularly in case of a post-accidental situation. It does not apply...