Least-squares dosimetry unfolding: the program STAY'SL. [STAY'SL Code]

Technical Report · Sat Oct 01 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5443582· OSTI ID:5443582

Perey, F. G.

A PDP-10 FORTRAN IV computer program STAY'SL, which solves the dosimetry unfolding problem by the method of least squares, is described. The solution (the output spectrum and its covariance matrix) is calculated by minimizing chi-square based on the input data (the activation data, the input spectrum, the dosimetry cross sections and their uncertainties given by covariance matrices). The solution reflects therefore the uncertainties in all of the input data and their correlations. The correlations among the various dosimetry cross sections are taken into account; however, the activation data, input spectrum and cross sections as classes are assumed to be uncorrelated with each other.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5443582
• Report Number(s): ORNL/TM-6062; ENDF-254
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
654002 -- Radiation & Shielding Physics-- Shielding Calculations & Experiments-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPUTER CALCULATIONS
COMPUTER CODES
DATA PROCESSING
DOSIMETRY
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
NEUTRON DOSIMETRY
NUMERICAL SOLUTION
PROCESSING
REACTOR SAFETY
S CODES
SAFETY
SHIELDING
SPECTRA UNFOLDING