RCL Slide Rule (1950s) |
| This slide rule was distributed by Radiation Counter Laboratories, Inc. (RCL) of Chicago Illinois. |
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Its had several functions. Given the half life of a nuclide and an elapsed
time, it calculates the fraction of the original activity that
remains. For a specified count rate and dead time, it determines what
fraction the observed count rate is of the actual count rate. For a
specified number of counts and count time, it calculates the standard
deviation of the count rate. It converts density (e.g., g/cm3)
and linear thickness (e.g., cm) to an aerial density (e.g., g/cm2)
and vice versa. Finally, it will estimate beta particle energies for a
specified range (mg/cm2).
References RCL. Use of the RCL Slide Rule. Instruction Sheet. Copyright date 1949. |
