Measured And Evaluated Neutron Cross Sections Of Elemental Bismuth
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Author | : A. Smith |
Publisher | : |
Total Pages | : 79 |
Release | : 1980 |
Genre | : Bismuth |
ISBN | : |
Download Measured and Evaluated Neutron Cross Sections of Elemental Bismuth Book in PDF, Epub and Kindle
Author | : James Dejuren |
Publisher | : |
Total Pages | : 12 |
Release | : 1950 |
Genre | : Bismuth |
ISBN | : |
Download Nuclear Cross Sections for 270 Mev Neutrons Book in PDF, Epub and Kindle
Author | : James DeJuren |
Publisher | : |
Total Pages | : 24 |
Release | : 1950 |
Genre | : Bismuth |
ISBN | : |
Download Nuclear Cross Sections for 95-Mev Neutrons Book in PDF, Epub and Kindle
The total cross sections of twelve different elements were measured using the neutron beam from the 184-in. cyclotron, operating with deuterons. Bismuth fission ionization chambers were employed as both monitor and detector in conventional 'good geometry' attenuation measurements in the neutron flux emerging from the 3-in. diameter collimating port in the 10-ft-thick concrete shielding. The mean energy of detection of the neutrons in this experiment is estimated to be 95 Mev. Measurements were also made with a monitor and detector placed inside the concrete shielding where an intense neutron flux over a large area could be obtained. Attenuators of four different elements were placed in front of the detector in a 'poor geometry' arrangement so that attenuation was due essentially to inelastic collisions which degrade the neutron energy below the fission threshold. A second detector was placed outside the concrete shielding In the collimated neutron beam in line with the neutron source, absorber, and first detector. Attenuation in it is caused by both inelastic and elastic scattering. By this arrangement the ratio of inelastic to total cross section can be determined directly in one experiment. The nuclear radii as calculated from the observed cross section, using the theory of the transparent nucleus, vary as 1.38 x 10(exp-13) A(exp(1/3)) cm. In this energy range the ratios of the inelastic to total cross sections are all less than one-half.
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1979 |
Genre | : |
ISBN | : |
Download Measured and Evaluated Bismuth Data for Fusion-fission-hybrid and Electro-nuclear Breeding Applications. [1 to 5 MeV]. Book in PDF, Epub and Kindle
Neutron total and scattering cross sections of elemental bismuth are measured to energies of approximately 4.5 MeV. The experimental results are used to deduce an optical-statistical model that is quantitatively descriptive of the measured values and of higher-energy results reported in the literature. The measured and calculated values, together with the body of information available in the literature, are utilized to derive a comprehensive evaluated nuclear data file in the ENDF format. This evaluation extends from 10/sup -5/ eV to 20 MeV, addresses neutron-induced and photon-emission processes, and is oriented toward the needs of fusion-fission-hybrid and electro-nuclear breeding applications. 4 figures, 1 table.
Author | : Anne A. Phillips |
Publisher | : |
Total Pages | : 10 |
Release | : 1948 |
Genre | : Bismuth |
ISBN | : |
Download Upper Limits of the Fission Cross Sections of Bismuth, Lead, Mercury, Gold, Platinum, Iridium and Tungsten for 14-Mev Neutrons Book in PDF, Epub and Kindle
Author | : Katharine Way |
Publisher | : |
Total Pages | : 24 |
Release | : 1948 |
Genre | : Thermal neutrons |
ISBN | : |
Download Thermal Neutron Cross Sections for Elements and Isotopes, H-Bi Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1975 |
Genre | : |
ISBN | : |
Download Measured and Evaluated Fast Neutron Cross Sections of Elemental Nickel Book in PDF, Epub and Kindle
Fast neutron total and scattering cross sections of elemental nickel are measured. Differential elastic scattering cross sections are determined from incident energies of 0.3 to 4.0 MeV. The cross sections for the inelastic neutron excitation of states at: 1.156 +- 0.015, 1.324 +- 0.015, 1.443 +- 0.015, 2.136 +- 0.013, 2.255 +- 0.030, 2.449 +- 0.030, 2.614 +- 0.020 and 2.791 +- 0.025 MeV are measured to incident neutron energies of 4.0 MeV. The total neutron cross sections are determined from 0.25 to 5.0 MeV. The experimental results are discussed in the context of optical and statistical models. It is shown that resonance width-fluctuation and correlation effects are significant. The present experimental and theoretical results, together with previously reported values, are used to construct a comprehensive evaluated elemental data file in the ENDF format. Some comparisons are made with previously reported evaluated files. In addition, some selected reactions which are widely used in dosimetry and other applications are presented as supplemental evaluated isotopic-data files. The numerical quantities are presented in tabular form. (3 tables, 29 figures) (auth).
Author | : Joseph L. Fowler |
Publisher | : |
Total Pages | : 1064 |
Release | : 1980 |
Genre | : Cross sections (Nuclear physics) |
ISBN | : |
Download Nuclear Cross Sections for Technology Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : 1058 |
Release | : 1980 |
Genre | : Weights and measures |
ISBN | : |
Download NBS Special Publication Book in PDF, Epub and Kindle
Author | : M. R. Bhat |
Publisher | : |
Total Pages | : 470 |
Release | : 1980 |
Genre | : Fast neutrons |
ISBN | : |
Download Symposium on Neutron Cross-sections from 10 to 50 MeV Book in PDF, Epub and Kindle