Kris—A computer program for the least-squares resolution of gamma-ray spectra by half-life and gamma-ray energy

KRIS offers the capability of resolving complex γ-spectra, even when spectra of the individual components are quite similar. A scheme is employed which allows for the use of half-lives as well as γ-ray energies in the least-squares resolution of γ-spectra. Options are also supplied for averaging of repetitive counts, least-squares smoothing of the data, iterative improvement of the weighting factors used in the least-squares solution, and use of either live or clock time counts. The number of control cards required for each sample has been minimized to simplify input. KRIS is written in FORTRAN IV and is being run under Fortran G and the Watfor compiler on the IBM 360/65. The name of the program, KRIS, is not an acronym, nor does it have any scientific significance.