High-resolution fission cross-section measurements of sup 235 U and sup 239 Pu

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · Nuclear Science and Engineering; (United States)

OSTI ID:7026899

Weston, L W; Todd, J H ^[1]

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1. Oak Ridge National Lab., Engineering Physics and Mathematics Div., Oak Ridge, TN (US)

The fission cross sections of the {sup 235}U and {sup 239}Pu are measured with very high neutron energy resolution (0.17 ns/m) in the energy region from 100 to 2000 eV for {sup 235}U and to 20,000 eV for {sup 239}Pu. This paper reports that the purpose of this measurement is to provide fission cross sections with energy resolution comparable with that available from transmission measurements for the purpose of deriving multilevel resolved resonance parameters. Fission ion chambers are used to detect fission fragments, and a {sup 10}B ionization chamber is used to measure the relative neutron flux at the 86-m flight path of the Oak Ridge Electron Linear Accelerator. The measured fission cross sections are the highest resolution measurements of good accuracy reported in the neutron energy range above 400 eV.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7026899
• Journal Information: Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 111:4; ISSN 0029-5639; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

663470* -- Fission-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ACCURACY
ACTINIDE ISO
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BORON 10
BORON ISOTOPES
CROSS SECTIONS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
EVEN-ODD NUCLEI
FISSION
FISSION FRAGMENTS
HEAVY NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZATION CHAMBERS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
LIGHT NUCLEI
LINEAR ACCELERATORS
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NATIONAL ORGANIZATIONS
NEUTRON FLUX
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
ORNL
PLUTONIUM 239
PLUTONIUM ISOTOPES
RADIATION DETECTORS
RADIATION FLUX
RADIOISOTOPES
RESOLUTION
SPONTANEOUS FISSION RADIOISOTOPES
STABLE ISOTOPES
URANIUM 235
URANIUM ISOTOPES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
YEARS LIVING RADIOISOTOPES