SIOB: a FORTRAN code for least-squares shape fitting several neutron transmission measurements using the Breit--Wigner multilevel formula. [For IBM-360/91]
The FORTRAN-IV code SIOB was developed to least-square fit the shape of neutron transmission curves. Any number of measurements on a common energy scale for different sample thicknesses can be simultaneously fitted. The computed transmission curves can be broadened with either a Gaussian or a rectangular resolution function or both, with the resolution width a function of energy. The total cross section is expressed as a sum of single-level or multilevel Breit--Wigner terms and Doppler broadened by using the fast interpolation routine QUICKW. The number of data points, resonance levels, and variables which can be handled simultaneously is only limited by the overall dimensions of two arrays in the program and by the stability of the matrix inversion. In a test problem seven transmissions each with 3750 data points were simultaneously fitted with 74 resonances and 110 variable parameters. The problem took 47 min of CPU time on an IBM-360/91, for 3 iterations. 3 figures, 2 tables.
- Research Organization:
- Oak Ridge National Lab., Tenn. (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6877401
- Report Number(s):
- ORNL/TM-6286; ENDF-261
- Country of Publication:
- United States
- Language:
- English
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MULTI: a FORTRAN code for least-squares shape fitting of neutron cross- section data using the Reich--Moore multilevel formalism
Journal Article
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Fri Dec 31 23:00:00 EST 1999
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·
OSTI ID:20005667
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Conference
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Wed Oct 01 00:00:00 EDT 1975
· Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)
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OSTI ID:7354522
MULTI: a FORTRAN code for least-squares shape fitting of neutron cross- section data using the Reich--Moore multilevel formalism
Technical Report
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Fri Mar 01 00:00:00 EDT 1974
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OSTI ID:4307458
Related Subjects
654003* -- Radiation & Shielding Physics-- Neutron Interactions with Matter
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ALPHA DECAY RADIOISOTOPES
BARYONS
COMPUTER CODES
COMPUTERS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
EVEN-EVEN NUCLEI
FERMIONS
FORTRAN
HADRONS
HEAVY NUCLEI
IBM COMPUTERS
INTERMEDIATE NEUTRONS
ISOTOPES
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
METALS
MULTILEVEL ANALYSIS
NEUTRAL-PARTICLE TRANSPORT
NEUTRON TRANSPORT
NEUTRONS
NUCLEI
NUCLEONS
NUMERICAL SOLUTION
PROGRAMMING LANGUAGES
RADIATION TRANSPORT
RADIOISOTOPES
RESONANCE NEUTRONS
S CODES
TOTAL CROSS SECTIONS
TRANSMISSION
URANIUM
URANIUM 238
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ALPHA DECAY RADIOISOTOPES
BARYONS
COMPUTER CODES
COMPUTERS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
EVEN-EVEN NUCLEI
FERMIONS
FORTRAN
HADRONS
HEAVY NUCLEI
IBM COMPUTERS
INTERMEDIATE NEUTRONS
ISOTOPES
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
METALS
MULTILEVEL ANALYSIS
NEUTRAL-PARTICLE TRANSPORT
NEUTRON TRANSPORT
NEUTRONS
NUCLEI
NUCLEONS
NUMERICAL SOLUTION
PROGRAMMING LANGUAGES
RADIATION TRANSPORT
RADIOISOTOPES
RESONANCE NEUTRONS
S CODES
TOTAL CROSS SECTIONS
TRANSMISSION
URANIUM
URANIUM 238
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES