Neutron capture cross section of /sup 240/Pu. [200 eV to 350 keV]
The average /sup 240/Pu capture cross section was measured from 200 eV to 350 keV. The cross section was normalized at thermal-neutron energies (0.02 to 0.03 eV), and this normalization was confirmed at the 1.06-eV resonance by the black resonance technique. The source of pulsed neutrons was the Oak Ridge Electron Linear Accelerator. The capture gamma-ray detector used was the ''total energy detector,'' which is a modification of the Moxon-Rae detector. The shape of the neutron flux was measured relative to the /sup 10/B(n,..cap alpha..) cross section up to 2 keV and the /sup 6/Li(n,..cap alpha..) cross section at higher neutron energies. The results of the measurement define the average capture cross section of /sup 240/Pu over a wide neutron energy range to an accuracy of approximately 8 percent, which is significantly better than previously known. The results indicate that the ENDF/B-IV evaluation is approximately 25 percent low above 30-keV neutron energy. The cross section is important in fast plutonium-fueled reactors.
- Research Organization:
- Oak Ridge National Lab., TN
- OSTI ID:
- 7318967
- Journal Information:
- Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 63:2; ISSN NSENA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the neutron capture cross sections of the actinides
Neutron capture cross section ratios of plutonium-240 and plutonium-242 versus gold-197 in the energy range from 50 to 250 keV
Related Subjects
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
EVEN-ODD NUCLEI
GAMMA RADIATION
HADRON REACTIONS
HEAVY NUCLEI
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
NEUTRON FLUX
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PLUTONIUM 240 TARGET
PLUTONIUM 241
PLUTONIUM ISOTOPES
RADIATION FLUX
RADIATIONS
RADIOISOTOPES
TARGETS
YEARS LIVING RADIOISOTOPES