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AbstractAbstract
[en] Targets of thorium nitrate tetrahydrate were pressed into discs of varying thickness, stacked, and irradiated with 14.8 MeV neutrons for 1 to 2 hr. Radiochemical analysis was performed on the dissolved samples for 99Mo and 113Ag. The ratios of the equilibrium activities of these two fission produced nuclides were calculated which indicate a peak-to-valley representation of the fission process. It was found as the sample thickness increased the ratio of the 99Mo/113Ag increased. Elastic scattering of the neutrons within the target materials appears to be the explanation for the observed change in the disappearance of the symmetric mode of fission of 232Th observed at the higher neutron energies. An estimation of the relative contributions of symmetric and asymmetric fission was made for the 14.8 MeV neutron induced fission of 232Th. (author)
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Journal Article
Journal
Journal of Inorganic and Nuclear Chemistry; ISSN 0022-1902;
; v. 43(7); p. 1439-1443

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BARYON REACTIONS, BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DAYS LIVING RADIOISOTOPES, DIMENSIONS, ELEMENTARY PARTICLES, ENERGY RANGE, EVEN-ODD NUCLEI, FERMIONS, HADRON REACTIONS, HADRONS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MEV RANGE, MINUTES LIVING RADIOISOTOPES, MOLYBDENUM ISOTOPES, NEUTRONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, ODD-EVEN NUCLEI, RADIOACTIVE MATERIALS, RADIOISOTOPES, SILVER ISOTOPES, TARGETS
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