ISOCRUNCH-MODIFICATIONS TO THE CRUNCH PROGRAM FOR THE IBM 7090
C.W. Friend, J.R. Knight · 1965
The IBM 7090 code ISOCRUNCH was developed by adding optional programs to the basic CRUNCH (ORNL-2958) code and modifying the input and output data formats.ISOCRUNCH can be used to compute the amount of each isotope in a reaction and decay chain for any specified neutron flux and time, to sum the contributions of various chains to the same isotope, to plot the yield of an isotope vs time for a given flux, and to find the optimum time for maximum yield of an isotope in a chain.The basic theory and use of ISOCRUNCH are described in this report, with sample problems and the FORTRAN calling program included.%