Photoneutron and photofission cross sections for /sup 238/U and /sup 232/Th using neutron capture gamma rays
The photofission and total photoneutron cross sections of /sup 238/U and /sup 232/Th have been measured as a function of energy between 4 and 11 MeV. The photons used were those produced in the neutron capture reaction in the Tangential Beam Port Facility of the University of Virginia Reactor. The capture gamma ray sources used were the following: Al, Cr, Co, Cu, Fe, Ni, S, and Ti. A computer code was used to calculate the spectrum of each capture gamma ray beam used in the irradiations. This calculation accounted for the attenuation in the beam and the contribution from neutron capture in Al and H. A second code iteratively solved for the best fit cross section curve for the experimentally obtained yield data. In the total photoneutron measurement, the neutrons were counted with a Halpern type detector containing 4 BF/sub 3/ tubes. The intensity of the beam was determined with LiF thermoluminescent dosimeters. The results agree very well with those of previous studies.
- Research Organization:
- Virginia Univ., Charlottesville (USA)
- OSTI ID:
- 6091472
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYONS
CAPTURE
CROSS SECTIONS
DATA
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FERMIONS
FISSION
FISSION FRAGMENTS
GAMMA SPECTRA
HADRONS
HEAVY NUCLEI
INFORMATION
ISOTOPES
KNOCK-OUT REACTIONS
MEV RANGE
MEV RANGE 01-10
NEUTRONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUMERICAL DATA
PHOTOFISSION
PHOTONUCLEAR REACTIONS
RADIOISOTOPES
SPECTRA
THORIUM 232
THORIUM ISOTOPES
TOTAL CROSS SECTIONS
URANIUM 238
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES