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| Release | : 1978 |
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The fission cross ratios of 239Pu to 235U were measured over the neutron energy range of 0.1 to 10 MeV. The atom ratios of the samples were based on their relative thermal fission rates and on their alpha activity.
| Author | : P. H. White |
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| Total Pages | : 23 |
| Release | : 1966 |
| Genre | : Cross sections |
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| Author | : Joseph L. Fowler |
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| Total Pages | : 1062 |
| Release | : 1980 |
| Genre | : Cross sections (Nuclear physics) |
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| Release | : 1986 |
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The measurement of the fission cross section ratios of nine isotopes relative to 235U at an average neutron energy of 14.74 MeV is described with particular attention to the determination of corrections and to sources of error. The results are compared to ENDF/B-V and to other measurements of the past decade. The ratio of the neutron induced fission cross section for these isotopes to the fission cross section for 235U are: 23°Th - 0.290 +- 1.9%; 232Th - 0.191 +- 1.9%; 233U - 1.132 +- 0.7%; 234U - 0.998 +- 1.0%; 236U - 0.791 +- 1.1%; 238U - 0.587 +- 1.1%; 237Np - 1.060 +- 1.4%; 239Pu - 1.152 +- 1.1%; 242Pu - 0.967 +- 1.0%. 40 refs., 11 tabs., 9 figs.
| Author | : Roald A. Schrack |
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| Total Pages | : 564 |
| Release | : 1975 |
| Genre | : Cross sections (Nuclear physics) |
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| Release | : 1978 |
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The ratio of the fission cross sections of 242Pu relative to 235U was measured over the energy range 0.4 to 10 MeV. Measurements were made at discrete energies with the ANL Fast Neutron Generator using time-of-flight techniques for background suppression. 9 references.
| Author | : Roald Amundsen Schrack |
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| Total Pages | : 554 |
| Release | : 1975 |
| Genre | : Cross sections (Nuclear physics) |
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| Total Pages | : |
| Release | : 1979 |
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The fission cross sections of 23°Th and 232Th were measured relative to 235U from near threshold to near 10 MeV. The weights of the thorium samples were determined by isotopic dilution. The weight of the uranium deposit was based on specific activity measurements of a 234U-235U mixture and low geometry alpha counting. Corrections were made for thermal background, loss of fragments in the deposits, neutron scattering in the detector assembly, sample geometry, sample composition and the spectrum of the neutron source. Generally the systematic errors were approx. 1%. The combined systematic and statistical errors were typically 1.5%. 17 references.
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| Total Pages | : 912 |
| Release | : 1976-05 |
| Genre | : Nuclear energy |
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| Release | : 1978 |
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The ratio of the fission cross sections of /sup 242/Pu relative to /sup 235/U was measured over the energy range 0.4 to 10 MeV. Measurements were made at discrete energies with the ANL Fast Neutron Generator using time-of-flight techniques for background suppression. 9 references.
