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Integral-capture measurements and cross-section adjustments for Nd, Sm, and Eu

Technical Report ·
OSTI ID:6156066
; ;
Integral-capture reaction rates are reported for /sup 143/Nd, /sup 144/Nd, /sup 145/Nd, /sup 147/Sm, /sup 151/Eu, /sup 152/Eu, /sup 153/Eu, and /sup 154/Eu irradiated in different neutron spectra in EBR-II. These reaction rates are based primarily on mass-spectrometric measurements of the isotopic atom ratios of the capture product to the target nuclide. The neutron spectra are characterized using passive neutron dosimetry and spectrum-unfolding with the FERRET least-squares data analysis code. Reaction rates for the neutron spectrum monitors were determined by the radiometric technique using Ge(Li) spectrometers. These rates are also reported here. The integral data for the rare-earth samples and for the spectrum monitors were used in multigroup flux/cross-section adtustment analyses with FERRET to generate adjustments to 47 group representations of the ENDF/B-IV capture cross sections for the rare-earth isotopes. These adjusted cross sections are in good agreement with recent differential data and with adjusted cross sections based on STEK integral data. Examples are given of the use of the adjusted cross sections and covariance matrices for cross-section evaluation.
Research Organization:
EG and G Idaho, Inc., Idaho Falls (USA); Hanford Engineering Development Lab., Richland, WA (USA)
DOE Contract Number:
AC07-76ID01570
OSTI ID:
6156066
Report Number(s):
EGG-PHYS-5182; ON: DE81029635
Country of Publication:
United States
Language:
English

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Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
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651725* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651825 -- Nuclear Properties & Reactions
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Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTIVATION DETECTORS
BARYON REACTIONS
BREEDER REACTORS
CAPTURE
CORRECTIONS
CROSS SECTIONS
DATA
EBR-2 REACTOR
EPITHERMAL REACTORS
EUROPIUM 151 TARGET
EUROPIUM 152 TARGET
EUROPIUM 153 TARGET
EUROPIUM 154 TARGET
EXPERIMENTAL DATA
EXPERIMENTAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FISSION PRODUCTS
HADRON REACTIONS
INFORMATION
INTEGRAL CROSS SECTIONS
ISOTOPES
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
NEODYMIUM 143 TARGET
NEODYMIUM 144 TARGET
NEODYMIUM 145 TARGET
NEUTRON DETECTORS
NEUTRON FLUX
NEUTRON REACTIONS
NEUTRON SPECTRA
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
POISONING
POWER REACTORS
RADIATION DETECTORS
RADIATION FLUX
RADIOACTIVE MATERIALS
REACTIVITY WORTHS
REACTOR COMPONENTS
REACTOR EXPERIMENTAL FACILITIES
REACTORS
RESEARCH AND TEST REACTORS
SAMARIUM 147 TARGET
SAMARIUM 149 TARGET
SAMPLE PREPARATION
SODIUM COOLED REACTORS
SPECTRA
TARGETS