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Author : Bāṃlādeśa Paramāṇu Śakti Kamiśana
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (13 download)
Download or read book Neutron-induced Fission Cross Section of Pu240 written by Bāṃlādeśa Paramāṇu Śakti Kamiśana and published by . This book was released on 1957 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. L. Henkel
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (91 download)
Download or read book Summary of Neutron-induced Fission Cross Sections written by R. L. Henkel and published by . This book was released on 1957 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Measurements of the Neutron-induced Fission Cross Sections of 24°Pu and 242Pu Relative to 235U. [0. 02 to 30 MeV, Tables]. PDF Online Free](https://books.google.com/books/content/images/frontcover/V4GiwgEACAAJ?fife=w200-h370)
Download or read book Measurements of the Neutron-induced Fission Cross Sections of 24°Pu and 242Pu Relative to 235U. [0. 02 to 30 MeV, Tables]. written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A continuation is given of the fission-cross-section ratio measurements in progress at the Lawrence Livermore Laboratory. Preliminary results are provided for the 24°Pu/235U and 242Pu/235U ratios from 0.02 to 30 MeV and 0.1 to 30 MeV, respectively. Using the threshold-cross-section method, the ratios were normalized to the values 1.368 +- 0.030 and 1.116 +- 0.025, respectively, from 1.75 to 4.00 MeV.
![Download Measurements of Neutron-induced Fission Cross-section Ratios Involving Isotopes of Uranium and Plutonium. [0. 001 to 30 MeV, Cross Sections]. PDF Online Free](https://books.google.com/books/content/images/frontcover/NdKVAQAACAAJ?fife=w200-h370)
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.
Download or read book Fluctuations in Neutron-Induced Fission Cross Sections written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. Younes
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)
Download or read book Tables of Neutron-Induced Fission Cross Section for Various Pu, U, and Th Isotopes, Deduced from Measured Fission Probabilites written by W. Younes and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cross sections for neutron-induced fission of {sup 231,233}Th, {sup 234,235,236,237,239}U, and {sup 240,241,243}Pu are presented in tabular form for incident neutron energies of 0.1 {le} E{sub n}(MeV) {le} 2.5. The cross sections were obtained by converting measured fission probabilities from (t, pf) reactions on mass-A targets to (n, f) cross sections on mass-A + 1 neutron targets, by using modeling to compensate for the differences in the reaction mechanisms. Data from Britt et al. were used for the {sup 234}U(t, pf) reaction, from Cramer et al. for the {sup 230,232}Th(t, pf), {sup 236,238}U(t, pf), and {sup 240,242}Pu(t, pf) reactions, and from Britt et al. for the {sup 233,235}U(t, pf) and {sup 239}Pu(t, pf) reactions. The fission probabilities P{sub (t, pf)}(E{sub x}), measured as a function of excitation energy E{sub x} of the compound system formed by the (t, p) reaction, are listed in the tables with the corresponding deduced cross sections as a function of incident neutron energy E{sub n}, {sigma}{sub (n, f)}(E{sub n}). The excitation energy and incident neutron energy are related by E{sub x} = E{sub n} + B{sub n}, where B{sub n}, where B{sub n} is the neutron binding energy. Comparison with ENDF/B-VI evaluations of the well-measured {sup 234,235,236}U(n, f) and {sup 240,241}Pu(n, f) cross sections confirms the accuracy of the present results within a 10% standard deviation above E{sub n} = 1 MeV. Below E{sub n} = 1 MeV, localized deviations of at most {+-} 20% are observed.
Download or read book Measurement of the Neutron-induced Fission Cross Section of 241Pu Relative to 235U from 0.001 to 30 MeV. written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ratio of the neutron-induced fission cross sections of 241Pu relative to that of 235U was measured with fission ionization chambers at the LLL 100-MeV electron linear accelerator. The time-of-flight technique was used to measure the cross-section ratio as a function of neutron energy from 0.001 to 30 MeV. The continuous energy spectrum of the neutron source allowed us to cover the entire energy range in one measurement. Pulse height distributions were also measured as functions of energy over broad energy bands. These data were used to estimate the energy variation in the efficiency to be less than 0.75 percent. The threshold cross-section method normalized the ratio independent of other cross-section measurements to 1.268 +- 0.022 in the interval 1.75 to 4.00 MeV. The ratio was also taken to thermal neutron energy where it was normalized to evaluated thermal fission cross sections and the resulting ratio in the 1.75- to 4.00-MeV interval was 1.242 +- 0.021. Corrected for the impurities in the 241Pu sample, the average of these two values resulted in a $sup 241$Pu:235U fission cross-section ratio of 1.251 +- 0.016 for the normalization interval. Typical energy resolution is 5 percent at 20.0, 1.0, and 0.1 MeV. Most of the data have counting uncertainties smaller than 4 percent, expressed as a standard deviation. Systematic errors are discussed, and current results are compared with previous measurements. Tables of our data are included. (9 tables, 8 figures) (auth).
Download or read book Neutron-induced Fission Cross Sections of 233U, 234U, 236U, and 238U with Respect to 235U. written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. H. Jaffey
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)
Download or read book Thermal Neutron Fission Cross Section of Pu241 written by A. H. Jaffey and published by . This book was released on 1955 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermal neutron fission cross section of Pu-241 has been measured relative to that of Pu-239 in the thermal column of the former Argonne heavy water reactor, CP-3'. The result was (sup sigma)F(sup 2200 m/s) = 1100 (plus or minus) 30 b if the Pu-241 cross section follows the 1/Nu relation.
Author : J. W. Behrens
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (13 download)
Download or read book Preview of a Measurement of the Neutron-induced Fission Cross Section of 241Pu Relative to 235U from 0.1 to 30 MeV written by J. W. Behrens and published by . This book was released on 1975 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download 238U Subthreshold Neutron Induced Fission Cross Section. [600 EV to 2 MeV]. PDF Online Free](https://books.google.com/books/content/images/frontcover/9l0snQAACAAJ?fife=w200-h370)
Download or read book 238U Subthreshold Neutron Induced Fission Cross Section. [600 EV to 2 MeV]. written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High resolution measurements of the 238U neutron induced fission cross section are reported for neutron energies between 600 eV and 2 MeV. The average subthreshold fission cross section between 10 and 100 keV was found to be 44 +- 6 .mu.b. (SDF).
Download or read book Measurement and Analysis of the Neutron-induced Fission Cross Sections of Sup 247Cm, Sup 250Cr and Sup 254Es written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sup 238/U Neutron-induced Fission Cross Section for Incident Neutron Energies Between 5 EV and 3. 5 MeV. written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A measurement of the /sup 238/U neutron-induced fission cross section was performed at the ORELA Linac facility in the neutron energy range between 5 eV and 3.5 MeV. The favorable signal-to-background ratio and high resolution of this experiment resulted in the identificaion of 85 subthreshold fission resonances or clusters of resonances in the neutron energy region between 5 eV and 200 keV. The fission data below 100 keV are characteristic of a weak coupling situation between Class I and Class II levels. The structure of the fission levels at the 720 eV and 1210 eV fission clusters is discussed. There is an apparent enhancement of the fission cross section at the opening of the 2/sup +/ neutron inelastic channel in /sup 238/U at 45 keV. An enhancement of the subthreshold fission cross section between 100 keV and 200 keV is tentatively interpreted in terms of the presence of a Class II, partially damped vibrational level. There is a marked structure in the fission cross section above 200 keV up to and including the plateau between 2 and 3.5 MeV. 11 figures and 6 tables.
Download or read book High Precision Neutron-Induced Fission Cross Sections Using a Time Projection Chamber written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (318 download)
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:
Author : J. W. Behrens
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (13 download)
Download or read book Neutron-induced Fission Cross Sections of 235U, 234U, 236U, and 238U with Respect to 235U written by J. W. Behrens and published by . This book was released on 1975 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Neutron-induced Fission Cross Section of 244Pu Relative to 235U from 0. 2 to 30 MeV. written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing fission cross section ratio studies at Lawrence Livermore Laboratory, preliminary results have been determined for the 244Pu/235U fission cross section ratio from 0.2 to 30 MeV. Using the threshold method, the value 0.980 +- 0.021 has been obtained for the average cross section ratio in the interval from 1.75 to 4.00 MeV.
