: It applies to self-contained irradiators using radionuclides like Cesium-137 ($^{137} ^{60}$Co) , or X-radiation.
: A page citation in the U.S. Federal Register regarding proposed rules by the Bureau of Economic Analysis for international services surveys. : It serves as a product part number
: It serves as a product part number for high-power connectors (e.g., 51939-137LF ) manufactured by Amphenol . : Covers installation
: The most recent major revision is ISO/ASTM 51939:2017 , which updated the format and narrowed the focus to self-contained photon irradiators, removing older teletherapy and electron beam sections. Other Notable Contexts for 51939 and performance qualification of irradiators
: A background land-use report from the Agricultural Land Commission (BC, Canada) concerning a subdivision application.
: Covers installation, operational, and performance qualification of irradiators, as well as routine dosimetric procedures.
The number is primarily associated with ISO/ASTM 51939 , an international technical standard and practice for blood irradiation dosimetry . ISO/ASTM 51939: Blood Irradiation Practice