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The Fission Cross Section Ratios And Error Analysis For Ten Thorium Uranium Neptunium And Plutonium Isotopes At 14 74 Mev Neutron Energy
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Book Synopsis The Fission Cross Section Ratios and Error Analysis for Ten Thorium, Uranium, Neptunium and Plutonium Isotopes at 14. 74 MeV Neutron Energy by :
Download or read book The Fission Cross Section Ratios and Error Analysis for Ten Thorium, Uranium, Neptunium and Plutonium Isotopes at 14. 74 MeV Neutron Energy written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Physics Briefs written by and published by . This book was released on 1988 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Fission Cross Sections of 23°Th, 232Th, 233U, 234U, 236U, 238U, 237Np, 239Pu and 242Pu Relative 235U at 14. 74 MeV Neutron Energy by :
Download or read book The Fission Cross Sections of 23°Th, 232Th, 233U, 234U, 236U, 238U, 237Np, 239Pu and 242Pu Relative 235U at 14. 74 MeV Neutron Energy written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1967 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutron Fission of 235,237,239U and 241,243Pu by :
Download or read book Neutron Fission of 235,237,239U and 241,243Pu written by and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a recent paper submitted to Phys. Rev. C they have presented estimates for (n, f) cross sections on a series of Thorium, Uranium and Plutonium isotopes over the range E{sub n} = 0.1-2.5 MeV. The (n, f) cross sections for many of these isotopes are difficult or impossible to measure in the laboratory. The cross sections were obtained from previous (t, pf) reaction data invoking a model which takes into account the differences between (t, pf) and (n, f) reaction processes, and which includes improved estimates for the neutron compound formation process. The purpose of this note is: (1) to compare the estimated cross sections to current data files in both ENDF and ENDL databases; (2) to estimate ratios of cross sections relatively to 235U integrated over the ''tamped flattop'' critical assembly spectrum that was used in the earlier 237U report; and (3) to show the effect on the integral cross sections when the neutron capturing state is an excited rotational state or an isomer. The isomer and excited state results are shown for 235U and 237U.
Book Synopsis The Fission Cross Sections of Some Thorium, Uranium, Neptunium and Plutonium Isotopes Relative to 235U by : J. W. Meadows
Download or read book The Fission Cross Sections of Some Thorium, Uranium, Neptunium and Plutonium Isotopes Relative to 235U written by J. W. Meadows and published by . This book was released on 1983 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Passive Nondestructive Assay of Nuclear Materials by : Doug Reilly
Download or read book Passive Nondestructive Assay of Nuclear Materials written by Doug Reilly and published by . This book was released on 1991 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fission Cross Sections of Thorium 232, Uranium 233, 235 and 236, Plutonium 239 Relative to Uranum 238 for 14 MeV Neutrons by : Warren Nyer
Download or read book Fission Cross Sections of Thorium 232, Uranium 233, 235 and 236, Plutonium 239 Relative to Uranum 238 for 14 MeV Neutrons written by Warren Nyer and published by . This book was released on 1950 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fission Cross Sections and Covariances 233U, 235U, 238U, 239Pu, 240Pu, and 241Pu by :
Download or read book Evaluation of Fission Cross Sections and Covariances 233U, 235U, 238U, 239Pu, 240Pu, and 241Pu written by and published by . This book was released on 2000 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of Neutron-induced Fission Cross-section Ratios Involving Isotopes of Uranium and Plutonium. [0. 001 to 30 MeV, Cross Sections]. by :
Download or read book Measurements of Neutron-induced Fission Cross-section Ratios Involving Isotopes of Uranium and Plutonium. [0. 001 to 30 MeV, Cross Sections]. written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A procedure, called the threshold cross section method was applied to our experimental data involving four uranium (233U 234U, 236U, and 238U) and five plutonium (239Pu, 24°Pu, 241Pu, 242Pu, and 244Pu) isotopes to determine ratios of fission cross sections relative to 235U. The data were gathered using ionization fission chambers and the time-of-flight technique at the LLL 100-MeV electron linear accelerator: measurements span the neutron energy range of 0.001 to 30 MeV. Experimental uncertainties common to past measurements were either eliminated or significantly reduced in this study by use of the threshold method, thereby making higher accuracies possible. The cross section ratios are absolute in the sense that they do not depend on the work of others. Results from our ratios involving 233U, 235U, 238U, and 239Pu are used to illustrate this method.
Book Synopsis Fission Cross Sections of Some Thorium, Uranium, Neptunium and Plutonium Isotopes Relative to 235U. by :
Download or read book Fission Cross Sections of Some Thorium, Uranium, Neptunium and Plutonium Isotopes Relative to 235U. written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Earlier results from the measurements, at this Laboratory, of the fission cross sections of 23°Th, 232Th, 233U, 234U, 236U, 238U, 237Np, 239Pu, 24°Pu, and 242Pu relative to 235U are reviewed with revisions to include changes in data processing procedures, alpha half lives and thermal fission cross sections. Some new data have also been included. The current experimental methods and procedures and the sample assay methods are described in detail and the sources of error are presented in a systematic manner. 38 references.
Book Synopsis Fission Cross Section of 239Th and 232Th Relative to 235U. [Threshold to 10 MeV, Cross Sections]. by :
Download or read book Fission Cross Section of 239Th and 232Th Relative to 235U. [Threshold to 10 MeV, Cross Sections]. written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis The Ratio of the (n, [gamma]) to (n, 2n) Cross Section for Thorium-232 Bombarded with Fission Neutrons by : R. A. Hasse
Download or read book The Ratio of the (n, [gamma]) to (n, 2n) Cross Section for Thorium-232 Bombarded with Fission Neutrons written by R. A. Hasse and published by . This book was released on 1957 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thorium-232 was exposed to an unmoderated neutron flux produced by uranium-235 fission. The ratio of the integrated cross sections for the (n, gamma) and (n, 2n) reactions was determined to be 14.0.
Book Synopsis Mass Ratios and Energy Released in the Fission of U235 and Pu239 by Thermal Neutrons by : Martin Deutsch
Download or read book Mass Ratios and Energy Released in the Fission of U235 and Pu239 by Thermal Neutrons written by Martin Deutsch and published by . This book was released on 1946 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of Absolute Fission Cross Section Ratios Using the Method of Threshold Cross Sections by :
Download or read book Determination of Absolute Fission Cross Section Ratios Using the Method of Threshold Cross Sections written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fission cross section measurements for a collection of uranium and plutoninm isotopes are presertly being made at LLL by using the 100-MeV electron linear accelerator as a pulsed source for neutrons. The cross sections are measured as a function of neutron energy from 15 MeV down to thermal energy by using the time-of-flight technique. For neutron energies above 1 MeV, a new method for determining absolute fission cross section ratios is used. This method, called the method of threshold cross sections, gives absolute fission cross section ratios without the need for determing the absolute masses of flssionable material within flssion chambers. An explanation of the threshold cross section method is given, and an example is cited for the absolute ratio sigma /sub f/(238): sigma /sub f/ (235) above 1 MeV. (auth).
Book Synopsis Thorium Fuel Cycle by : International Atomic Energy Agency
Download or read book Thorium Fuel Cycle written by International Atomic Energy Agency and published by . This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a critical review of the thorium fuel cycle: potential benefits and challenges in the thorium fuel cycle, mainly based on the latest developments at the front end of the fuel cycle, applying thorium fuel cycle options, and at the back end of the thorium fuel cycle.
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