RSAP - A Code for Display of Neutron Cross Section Data and SAMMY Fit Results

Technical Report · Fri Feb 02 04:00:00 EST 2001

DOI:https://doi.org/10.2172/777694· OSTI ID:777694

Sayer, R O ^[1]

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1. ORNL

RSAP is a computer code for display of neutron cross section data and selected SAMMY output. SAMMY is a multilevel R-matrix code for fitting neutron time-of-flight cross-section data using Bayes' method. RSAP, which runs on the Digital Unix Alpha platform, reads ORELA Data Files (ODF) created by SAMMY and uses graphics routines from the PLPLOT package. In addition, RSAP can read data and/or computed values from ASCII files with a format specified by the user. Plot output may be displayed in an X window, sent to a postscript file (rsap.ps), or sent to a color postscript file (rsap.psc). Thirteen plot types are supported, allowing the user to display cross section data, transmission data, errors, theory, Bayes fits, and residuals in various combinations. In this document the designations theory and Bayes refer to the initial and final theoretical cross sections, respectively, as evaluated by SAMMY. Special plot types include Bayes/Data, Theory--Data, and Bayes--Data. Output from two SAMMY runs may be compared by plotting the ratios Theory2/Theory1 and Bayes2/Bayes1 or by plotting the differences (Theory2-Theory1) and (Bayes2-Bayes1).

• Research Organization: Oak Ridge National Lab., TN (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 777694
• Report Number(s): ORNL/TM-2001/15
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
99 GENERAL AND MISCELLANEOUS
COMPUTER GRAPHICS
CROSS SECTIONS
NEUTRONS
R CODES
R MATRIX