- Activity is deposited into the eye of a needle to produce a point source
- Packaged in a test tube with the needle inserted on the inside of the stopper
- Polonium Emitter 0.1 µCi has a half-life of 138 days
- Strontium Emitter 0.1 µCi has a half-life of 28.5 years
- Lead Emitter 0.1 µCi has a half-life of 20.4 years
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