Absolute measurement of the uranium-235 fission cross section from 0. 2 to 1. 2 MeV

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Nucl. Sci. Eng.; (United States)

OSTI ID:6936961

Wasson, O A; Duvall, K C; Meier, M M

The absolute /sup 235/U neutron-induced fission cross section has been measured at the U.S. National Bureau of Standards (NBS) 3-MV Van de Graaff Laboratory from 0.2- to 1.2-MeV neutron energy. The mass of the /sup 235/U contained in a large volume multiplated fission ionization chamber was measured relative to the NBS fissionable isotope mass standards. Pulsed beam time-of-flight techniques were used with neutrons from the /sup 7/Li(p,n)/sup 7/Be reaction while the neutron flux was monitored with a large plastic scintillator whose efficiency was both calculated and measured with the associated-particle technique. The cross sections, which were measured with a typical uncertainty of 2.3%, are about2% lower than the ENDF/B-V evaluation.

• Research Organization: National Bureau of Standards, Washington, DC 20234
• OSTI ID: 6936961
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 81:2; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BARYON REACTIONS
BARYONS
BERYLLIUM 7
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
CROSS SECTIONS
DATA
DATA COVARIANCES
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FAST FISSION
FERMIONS
FISSION
FISSION CHAMBERS
FISSION NEUTRONS
FISSION SPECTRA
FISSIONABLE MATERIALS
HADRON REACTIONS
HADRONS
INFORMATION
IONIZATION CHAMBERS
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LABORATORIES
LIGHT NUCLEI
LITHIUM 7
LITHIUM ISOTOPES
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
MEV RANGE
MEV RANGE 01-10
NATIONAL ORGANIZATIONS
NEUTRON DETECTORS
NEUTRON FLUX
NEUTRON REACTIONS
NEUTRON SOURCES
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
PARTICLE SOURCES
PHOSPHORS
PLASTIC SCINTILLATORS
PULSE TECHNIQUES
RADIATION DETECTORS
RADIATION FLUX
RADIATION SOURCES
RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
STANDARDS
TARGETS
TIME-OF-FLIGHT METHOD
URANIUM 235 TARGET
US DOC
US NBS
US ORGANIZATIONS