Fast neutron ineleastic scattering cross sections of /sup 238/U for states between 680 and 1530 keV

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Nucl. Sci. Eng.; (United States)

OSTI ID:5841903

Shao, J Q; Couchell, G P; Egan, J J; Kegel, G H.R.; Li, S Q; Mittler, A; Pullen, D J; Schier, W A; Arthur, E D

Neutron inelastic scattering cross sections for /sup 238/U levels between 680- and 1530-keV excitation energy have been measured in the incident neutron energy range from 0.9 to 2.2 MeV. The (n,n') time-of-flight (TOF) technique was used to obtain direct differential inelastic cross sections. Neutrons were generated using the /sup 7/Li(p,n)/sup 7/Be reaction. Experimental parameters were optimized to achieve an energy resolution of <15 keV. Level cross sections were deduced from the measured 125-deg differential scattering cross sections. The validity of this procedure was confirmed by measuring the angular distributions for nine levels at En=1.5 and 2.0 MeV. Background due to fission induced by fast neutrons was subtracted. The TOF spectra were unfolded using the method of the response function. The data were corrected for multiple scattering and neutron attenuation in disk scattering geometry using an analytic method. Theoretical calculations of the cross sections were carried out using reaction models appropriate to the description of compound nucleus and direct interaction processes. The data are compared to (n,n'..gamma..) results and the ENDF/B-V evaluation.

• Research Organization: University of Lowell, Department of Physics and Applied Physics, Lowell, MA 01854
• OSTI ID: 5841903
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 92:3; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

652025* -- Nuclear Properties &amp; Reactions
A=220 &amp; above
Experimental-- Nuclear Reactions &amp; Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
ANGULAR DISTRIBUTION
ATTENUATION
BARYON REACTIONS
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BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
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DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITATION
FAST NEUTRONS
FERMIONS
FISSION
FUNCTIONS
HADRON REACTIONS
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HEAVY NUCLEI
INELASTIC SCATTERING
ISOTOPES
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
LIGHT NUCLEI
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MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
MULTIPLE SCATTERING
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PROTON REACTIONS
RADIOISOTOPES
RESPONSE FUNCTIONS
SCATTERING
TARGETS
TIME-OF-FLIGHT METHOD
TOTAL CROSS SECTIONS
URANIUM 238
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES