Source range field calibration fixture

摘要

A portable dosimeter calibration device has a shielded container with a cover, and providing a cavity in which dosimeters may be spaced about a central shielded compartment. An elongated carrier rod has a radiation source adjacent its lower end and extends outwardly of the cover. The end of the rod with the radiation source is normally seated in a shielded well of the compartment in a first position of the rod, and the rod may be secured in a second elevated position in which it is aligned with a radiation passage in the shielding of the compartment to expose the dosimeter to radiation.