GE Radioisotope Decay Calculator (1970s) |
| The Radioisotope Decay Calculator was marketed by the General Electric Company. More specifically, the calculator identifies GE's Irradiation Processing operation in Pleasanton California. An ID number, 1M 6/71, would appear to indicate that it was probably produced in the 1970s. |
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| It only has one purpose, to determine the fraction of the source activity that remains after a specified period of time has elapsed. You simply line up the elapsed time with the nuclide half-life and read the result. To make it a little easier, a number of nuclides are indicated on the half-life scale. The back of the calculator converts time units (e.g., hours to days and days to years) and gives the half-lives for a large number of radionuclides. |
