Tom Miller wrote:
If you're concerned about whether or not it is radio-active, place a
roll of
photographic film in its container near it for 24 hours, then develop
it. If
its exposed, start organising a medical examination!



That will not detect an alpha emitter as alphas will not penetrate
the metal casing of the film canister. Alphas and very low energy
Betas can be very difficult to detect. However, they will not
penetrate the dead skin cells on the surface of your skin, let
alone normal clothing so they are also a minimal hazard UNLESS
the material is heated, ground, cut, or otherwise handled in
some way as to send particles airborn where they may be inhaled.

Most survey meters will not detect alphas or low energy betas
as to do so requires a very low density, and therefor fragile
window. Historically, extremely thin slices of mica were used
for the windows on alpha detectors.

If you think or suspect that you are in posession of radioactive
material inappropriate for consumer use please call your state
EPA or even your local fire or police department. They may not
be equipped to test the material but they should know whom to
contact.

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FF