AECL Decay Calculator (1960s)

The Decay Calculator was distributed by Atomic Energy of Canada Limited (AECL) in the mid to late 1960s  -  it carries the date 9-64. It is identical to the Decay Rate Calculator except that it is made of cardboard rather than plastic.

To use, you line up the half-life of a source with the elapsed time, and the calculator tells you the remaining fraction of the source's original activity. The back of the calculator has a table of half-lives for various radionuclides and a conversion table for units of time.

Size: 5.5" diameter

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Last updated: 05/10/11
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