Isotrak Cs-137 Demo Source

A demonstration radioactive source, mounted at the end of an 85mm x 12mm aluminium rod which is stored in an aluminium block. The mounting makes them very easy and safe to handle. The bright anodised aluminium provides high visibility. These sources and are sent out direct from the manufacturer.
Type: Gamma Source: Caesium -137 (370kBq & 30 year half-life)

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Q =  What are the half-lives and activity of these?

A = Alpha Source: Americium-241 (74 kBq & 432.2 year half-life)
 Beta Source: Strontium-90 (74kBq & 28.8 year half-life)
 Gamma Source: Caesium -137 (370kBq & 30 year half-life)