Isotope Calculator for Neutron Activation (ca. 1950)
The Isotope Calculator was designed by the Isotope Division of AERE, Harwell, England
for the purpose of calculating the specific activities of materials exposed
to neutrons. It is 9" in
diameter and made of four 1/16" plastic disks. A beautiful
To perform the calculations, the following information is required: the atomic weight (mass) of the target, the target cross section, the neutron fluence rate (or flux), the half-life of the activation product, and the the irradiation time. The instructions on the back of the slide rule (see photo to right) are self explanatory.
Size: 9" diameter
W.S. Eastwood. A.E.R.E. Report IR/333 An Isotope Calculator. April 1949.
Donated by Paul Tyree
Copyright 1999, Oak Ridge Associated Universities