Reaction differential cross sections from the least-squares unfolding of ratio data measured in diverse neutron fields
Technical Report
·
OSTI ID:5203969
A previously-described procedure for deriving threshold reaction differential cross sections from integral measurements in well-specified neutron fields by means of least-squares unfolding is extended to the analysis of ratio data. The following information is required for the least-squares analysis of ratio data: (1) shape specifications for the neutron spectra and the associated uncertainties and correlations, (2) standard reaction group cross section values and their covariance matrix, (3) the ratio data and their covariance matrix, and (4) the a priori group cross sections and their covariance matrix. Knowledge of the absolute neutron fluence is not required. In order to illustrate this method, a special class of ratio measurements is investigated in detail and numerical analysis is performed for a hypothetical simulated experiment.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5203969
- Report Number(s):
- ANL/NDM-82; ON: DE84006748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651000* -- Nuclear Physics
651715 -- Nuclear Properties & Reactions
A=90-149
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CALCULATION METHODS
CROSS SECTIONS
DATA COVARIANCES
DATA PROCESSING
DIFFERENTIAL CROSS SECTIONS
ENERGY
HADRON REACTIONS
LEAST SQUARE FIT
MATRICES
MAXIMUM-LIKELIHOOD FIT
MULTIGROUP THEORY
NEUTRON REACTIONS
NEUTRON SPECTRA
NEUTRON TRANSPORT THEORY
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL SOLUTION
PROCESSING
SPECTRA
THRESHOLD ENERGY
TRANSPORT THEORY
651715 -- Nuclear Properties & Reactions
A=90-149
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CALCULATION METHODS
CROSS SECTIONS
DATA COVARIANCES
DATA PROCESSING
DIFFERENTIAL CROSS SECTIONS
ENERGY
HADRON REACTIONS
LEAST SQUARE FIT
MATRICES
MAXIMUM-LIKELIHOOD FIT
MULTIGROUP THEORY
NEUTRON REACTIONS
NEUTRON SPECTRA
NEUTRON TRANSPORT THEORY
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL SOLUTION
PROCESSING
SPECTRA
THRESHOLD ENERGY
TRANSPORT THEORY