Neutron capture and fission cross section of /sup 243/Am in the energy range from 5 to 250 keV
The neutron capture and subthreshold fission cross section of /sup 243/Am was measured in the energy range from 5 to 250 keV using /sup 197/Au and /sup 235/U as the respective standards. Neutrons were produced via the /sup 7/Li(p,n) and the T(p,n) reaction with the Karlsruhe 3-MV pulsed Van de Graaff accelerator. Capture events were detected by two Moxon-Rae detectors with graphite and bismuth graphite converters, respectively. Fission events were registered by an Ne-213 liquid scintillator with pulse-shape discriminator equipment. Flight paths as short as 50 to 70 mm were used to obtain an optimum signal-to-background ratio. After correction for the different efficiency of the individual converter materials, the capture cross section could be determined with a total uncertainty of 3 to 6%. The respective values for the fission cross section are 8 to 12%. The results are compared to predictions of recent evaluations, which in some cases are severely discrepant.
- Research Organization:
- Kernforschungszentrum Karlsruhe GmbH, Institut fur Angewandte Kernphysik Karlsruhe
- OSTI ID:
- 6432151
- Journal Information:
- Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 85:3; ISSN NSENA
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
AMERICIUM 243 TARGET
BARYON REACTIONS
BISMUTH
CAPTURE
CAPTURE-TO-FISSION RATIO
CARBON
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DATA
DISCRIMINATORS
ELECTRONIC CIRCUITS
ELECTROSTATIC ACCELERATORS
ELEMENTAL MINERALS
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FISSION
GRAPHITE
HADRON REACTIONS
INFORMATION
KEV RANGE
LIQUID SCINTILLATORS
METALS
MINERALS
NEUTRON REACTIONS
NEUTRON SOURCES
NONMETALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE SOURCES
PHOSPHORS
PULSE CIRCUITS
PULSE DISCRIMINATORS
RADIATION SOURCES
TARGETS
VAN DE GRAAFF ACCELERATORS