BS EN 12679:2018规定了用X射线照相法测定由放射性核素铱192、镱169、硒75或钴60制成的0.5mm或更大的伽马射线照相源的尺寸。射线源的尺寸是影响γ射线图像质量的重要因素。交叉引用:ISO 16371-1EN ISO 19232-5ASTM E2597/E2597M-14ASTM E2002-15ASTM E1114-09（2014）购买本文件时，所有当前可用的修订都包括在购买本文件中。

BS EN 12679:2018 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.Cross References:ISO 16371-1EN ISO 19232-5ASTM E2597/E2597M - 14ASTM E2002 - 15ASTM E1114 - 09(2014)All current amendments available at time of purchase are included with the purchase of this document.