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Measurement of /sup 238/U(n,n'. gamma. ) and /sup 7/Li(n,n'. gamma. ) gamma-ray production cross sections. [0. 48 to 5. 0 MeV, preliminary results]

Technical Report ·
DOI:https://doi.org/10.2172/5893653· OSTI ID:5893653
; ;
Time-of-flight techniques and a 95-cm/sup 3/ Ge(Li) detector positioned 20 m from the ORELA white neutron source have been utilized to measure 125/sup 0/ cross sections for the production of gamma rays in /sup 238/U and /sup 7/Li samples by 0.48 to 5.0-MeV neutrons. The incident neutron flux was determined with a proton-recoil telescope which used a solid-state, recoil-proton detector. Altogether, 28 cross sections for /sup 238/U transitions from levels with 680 to 1224 keV of excitation were measured. In addition, 7 branching ratios for weak /sup 238/U transitions and the /sup 7/Li(n,n'..gamma..)/sup 7/Li* (478 keV) cross section were measured. From these data and other level-decay information, preliminary neutron inelastic scattering cross sections were constructed and compared with those at 680, 732, 827, 965, 1048, and 1170-keV of excitation from the proposed ENDF/B-V evaluation. 40 references.
Research Organization:
Oak Ridge National Lab., TN (USA)
DOE Contract Number:
W-7405-ENG-26
OSTI ID:
5893653
Report Number(s):
ORNL/TM-6832
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BRANCHING RATIO
CROSS SECTIONS
DATA FORMS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
GAMMA SPECTRA
GRAPHS
HADRON REACTIONS
HEAVY NUCLEI
INELASTIC SCATTERING
ISOLATED VALUES
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LITHIUM 7 TARGET
MEV RANGE
MEV RANGE 01-10
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RADIOISOTOPES
RECOILS
SCATTERING
SPECTRA
TARGETS
URANIUM 238
URANIUM 238 TARGET
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES