Alpha-beta-gamma sources

Construction
The source is constructed from 3 active components.
Am-241 is incorporated in the surface of an anodized aluminium foil, and mounted at the top of the source.
A Sr-90 foil is constructed in the same way and mounted below the Am-241 foil. An ion-exchange resin bead impregnated with Cs-137 is glued into an inner capsule and mounted under the foils.
The casing is constructed from black anodized aluminium and the source is supplied in a lightweight storage case. A plastic cap is supplied to protect the surface of the source when not in use.