Integral data analysis for resonance parameter determination

Neutron time-of-flight experiments have long been used to determine resonan ce parameters. Those resonance parameters have then been used in calculatio ns of integral quantities such as Maxwellian averages or resonance integral s, and results of those calculations in turn have been used as a criterion for acceptability of the resonance analysis. However, the calculations were inadequate because covariances on the parameter values were not included i n the calculations. An effort to correct for that deficiency is documented: The R-matrix analysis code SAMMY has been modified to include integral qua ntities of importance, directly within the resonance parameter analysis, to determine the best fit to both differential (microscopic) and integral (ma croscopic) data simultaneously. This modification was implemented because i t is expected to have an impact on the intermediate Energy range that is im portant for criticality safety applications.