This standard specifies the determination of the size of gamma radiographic sources of 0,5 mm or greater, made
from the radionuclides Iridium 192, Ytterbium 169, Selenium 75 or Cobalt 60, by a method of radiography with
X-rays. The source size of a gamma radiography source is an important factor which affects the image quality of
gamma ray images.
The source size is determined with an accuracy of ± 10 % or 0,1 mm max.
This standard can be used for other radionuclides after validation.
Warning - Exposure of any part of the human body to X-rays or gamma-rays can be highly injurious to
health. Wherever X-ray equipment or radioactive sources are in use, it is essential to apply the
appropriate legal requirements.