FIELD: physics.
SUBSTANCE: invention relates to a gamma radiation source. Radiation source contains iridium, in which the density of the active insert containing iridium is in range of 30–85 % relative to pure iridium with 100-percent density, wherein the iridium is in form of microgranules.
EFFECT: activation target insert is formed in the form of a disc and contains a plurality of iridium microgranules.
25 cl, 11 dwg
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