Decay Rate Calculator (1960s) |
| The Decay Calculator, produced by
the Graphic Calculator Company, carries a copyright date of 1960. As such,
it was probably produced and distributed sometime in the 1960s. A nearly
identical calculator was distributed by Atomic Energy of Canada
Limited (AECL) in the mid to late 1960s.
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 1/2" diameter |
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