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SAMMY: Nuclear Cross Section Evaluation Tool

Problem Statement

Evaluations of nuclear cross sections data and their uncertainties using physics-based formalism is needed to decrease cross section data uncertainties for advanced simulations of nuclear application.

Technical Approach

Bayesian fitting of R-matrix resonance parameters implemented in SAMMY combines prior resonance parameters values and uncertainties with measured data and data uncertainties to yield updated parameter values and uncertainties.  This yields new evaluations of partial (elastic, neutron, capture, fission) and total cross sections of neutron, proton, and a-particle induced reactions in the resolved and unresolved resonance energy ranges.


New cross section evaluations are distributed to the public via the United States Evaluated Nuclear Data File (ENDF) that is a basis for the SCALE nuclear data library.



Principal Investigator

Goran Arbanas

Project Details

Start Date