Iridium 192 is the most versatile industrial radioisotope resulting in the most commonly used thicknesses of steel. The sources are constructed from thin wafers containing the Ir-192 in the centre of the capsule. With a large specific activity high activity sources can be achieved with small physical dimensions, 11 curies from 1x1mm cylinder.
Iridium 192 sources can be made in a wide variety of dimensions starting at 0.5mm in width and 0.2mm in height to 4mm width x 4mm height, this allows activities to be manufactured between 0.5 and 200 curies.
| Half-life: |
73.83 days |
| Mode of decay: |
Beta particles and gamma 206-612 keV (avg 353 keV) |
| Chemical Properties: |
Dense metal, metallic |
| Optimum working thickness: |
10mm to 60mm steel |
| Exposure Rate: (Curies) |
1Ci @ 1 metre gives 4810 uSv/hr |
| Exposure Rate: (GBq) |
1GBq @ 1 metre gives 130 uSv/hr |
Further Information:
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