Iodine-131 (I-131) is a beta and gamma emitter. The energies of both are significant, so quite high dose rates are emitted by this nuclide, and the gamma radiation is very penetrating. The half-life is 8 days. Over the likely period of use of the material, there is not a large reduction in activity. Therefore, there can be an external radiation risk in the use of this nuclide. Artemis Shielding has developed a certified, patented, lead free mobile barrier following IEC 61331-1 Edition 2.0 2104—05 to shield against I-131.
Barriers can be custom made to any size and will weigh roughly half the weight of a traditional leaded barrier used to shield against I-131.