Fission Cross Section Ratios For Sup 233234236 U Relative To Sup 235 U From 0 5 To 400 Mev PDF Download
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| Total Pages | : 5 |
| Release | : 1991 |
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Download Fission Cross Section Ratios for Sup 233,234,236 U Relative to Sup 235 U from 0. 5 to 400 MeV. Book in PDF, ePub and Kindle
Neutron-induced fission cross section ratios from 0.5 to 400 MeV for samples of {sup 233, 234, 236}U relative to 235U have been measured at the WNR neutron Source at Los Alamos. The fission reaction rate was determined using a fast parallel plate ionization chamber at a 20-m flight path. Cross sections over most the energy range were also extracted using the neutron fluence determined with three different proton telescope arrangements. Those data provided the shape of the 235U(n, f) cross section relative to the hydrogen scattering cross section. That shape was then normalized to the very accurately known value for 235U(n, f) at 14.1 MeV to allow us to obtain cross section section values from the ratio data and our values for 235U(n, f). 6 refs., 1 fig.
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| Release | : 1979 |
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Download Fission Cross Section of [sup]239[/sup]Th and [sup]232[/sup]Th Relative to [sup]235[/sup]U. Book in PDF, ePub and Kindle
The fission cross sections of /sup 230/Th and /sup 232/Th were measured relative to /sup 235/U 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 /sup 234/U-/sup 235/U 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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| Release | : 1986 |
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Download The Fission Cross Sections of 23°Th, 232Th, 233U, 234U, 236U, 238U, 237Np, 239Pu and 242Pu Relative 235U at 14. 74 MeV Neutron Energy Book in PDF, ePub and Kindle
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.
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| Total Pages | : 1088 |
| Release | : 1991 |
| Genre | : Government reports announcements & index |
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Download Government Reports Annual Index Book in PDF, ePub and Kindle
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| Total Pages | : 682 |
| Release | : 1991 |
| Genre | : Science |
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Download Government Reports Announcements & Index Book in PDF, ePub and Kindle
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| Release | : 1978 |
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Download Fission Cross Section of 239Pu Relative to 235U from 0. 1 to 10 MeV. Book in PDF, ePub and Kindle
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.
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| Release | : 1987 |
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Download The Fission Cross Section Ratios and Error Analysis for Ten Thorium, Uranium, Neptunium and Plutonium Isotopes at 14. 74 MeV Neutron Energy Book in PDF, ePub and Kindle
The error information from the recent measurements of the fission cross section ratios of nine isotopes, 23°Th, 232Th, 233U, 234U, 236U, 238U, 237Np, 239Pu, and 242Pu, relative to 235U at 14.74 MeV neutron energy was used to calculate their correlations. The remaining 36 non-trivial and non-reciprocal cross section ratios and their errors were determined and compared to evaluated (ENDF/B-V) values. There are serious differences but it was concluded that the reduction of three of the evaluated cross sections would remove most of them. The cross sections to be reduced are 23°Th - 13%, 237Np - 9.6% and 239Pu - 7.6%. 5 refs., 6 tabs.
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| Total Pages | : 56 |
| Release | : 1986 |
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Download The Fission Cross Sections of Sup 230Th, Sup 232Th, Sup 233U, Sup 234U, Sup 236U, Sup 238U, Sup 237Np, Sup239Pu, and Sup 242Pu Relative Sup 235U at 14.74 MEV Nuetron Energy Book in PDF, ePub and Kindle
| Author | : Benjamin C. Diven |
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| Total Pages | : 24 |
| Release | : 1953 |
| Genre | : Fission cross sections |
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Download The Fission Cross Section of U239 from 0.4 to 1.6 Mev Book in PDF, ePub and Kindle
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| Total Pages | : 88 |
| Release | : 2000 |
| Genre | : Cross sections (Nuclear physics) |
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Download Evaluation of Fission Cross Sections and Covariances 233U, 235U, 238U, 239Pu, 240Pu, and 241Pu Book in PDF, ePub and Kindle
