Neodymium, samarium and europium capture cross-section adjustments based on EBR-II integral measurements. [Preliminary results]

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5753126

Anderl, R. A.; Harker, Y. D.; Schmittroth, F.

Integral capture measurements were made for highly enriched isotopes of neodymium, samarium and europium irradiated in a row 8 position of EBR-II with samples located both at mid-plane and in the axial reflector. Broad response, resonance, and threshold dosimeters were included to characterize the neutron spectra at the sample locations. The saturation reaction rates for the rare-earth samples were determined by post-irradiation mass-spectrometric analyses and for the dosimeter materials by the gamma-spectrometric method. The HEDL maximum-likelihood analysis code, FERRET, was used to make a least-squares adjustment of the ENDF/B-IV rare-earth cross sections based on the measured dosimeter and fission-product reaction rates. Preliminary results to date indicate a need for a significant upward adjustment of the capture cross sections for /sup 143/Nd, /sup 145/Nd, /sup 147/Sm and /sup 148/Sm. 14 references.

• Research Organization: Idaho National Engineering Lab., Idaho Falls (USA); Hanford Engineering Development Lab., Richland, WA (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-07-1570
• OSTI ID: 5753126
• Report Number(s): CONF-791058--20
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CAPTURE
CROSS SECTIONS
DATA
DATA FORMS
ENERGY
EUROPIUM ISOTOPES
EXPERIMENTAL DATA
FISSION PRODUCTS
GRAPHS
HADRON REACTIONS
INFORMATION
INTEGRAL CROSS SECTIONS
ISOLATED VALUES
ISOTOPES
KINETICS
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
NEODYMIUM ISOTOPES
NEUTRON REACTIONS
NEUTRON SPECTRA
NUCLEAR REACTION KINETICS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
NUMERICAL SOLUTION
RADIOACTIVE MATERIALS
RARE EARTH ISOTOPES
REACTION KINETICS
RESONANCE
SAMARIUM ISOTOPES
SPECTRA
THRESHOLD ENERGY