Fast-neutron Total Cross Sections of Beryllium, Carbon, and Oxygen
Author : David Bruce Fossan
Publisher :
Page : 178 pages
File Size : 26,35 MB
Release : 1961
Category : Beryllium
ISBN :
Author : David Bruce Fossan
Publisher :
Page : 178 pages
File Size : 26,35 MB
Release : 1961
Category : Beryllium
ISBN :
Author : Richard G. Nucholls
Publisher :
Page : 12 pages
File Size : 21,39 MB
Release : 1946
Category : Deuterium
ISBN :
Author : G. D. Joanou
Publisher :
Page : 84 pages
File Size : 11,92 MB
Release : 1961
Category : Beryllium
ISBN :
Author : J. H. RAY
Publisher :
Page : 181 pages
File Size : 43,37 MB
Release : 1965
Category :
ISBN :
Neutron cross-section sets were prepared for N, O, Al, Si, Fe, D, and Be for neutron energies from 0.037 eV to 18 MeV. The cross sections tabulated include the total, elastic, inelastic, (n,2n), and cross sections for charged particle emission. Information is also given on the angular distribution of elastically scattered neutrons and on the energy distribution of neutrons and gamma-rays following nonelastic reactions. (Author).
Author : David T. Goldman
Publisher :
Page : 674 pages
File Size : 45,79 MB
Release : 1968
Category : Neutron cross sections
ISBN :
Author : Donald J. Hughes
Publisher : Elsevier
Page : 193 pages
File Size : 35,30 MB
Release : 2016-01-22
Category : Science
ISBN : 1483282759
Neutron Cross Sections presents the principles of cross-section measurement and use, as well as sufficient theory so that the general behavior of cross sections is made understandable. This compilation is a direct result of experiences connected with the collection and evaluation of cross-section data during the past eight years at ""Sigma Centre"", Brookhaven National Laboratory. Here, experimental results received from laboratories throughout the world are carefully evaluated and compiled in the curves and tables of the large volume Neutron Cross Sections, The most recent version of the compilation, known as BNL 325, appeared 1 July 1955, and Supplement 1 to BNL 325 was published on 1 January 1957. The compilation itself consists almost completely of cross sections at specific energies, shown in the form of curves or tables, with only brief explanatory texts. The text opens with discussions of the general properties of cross sections and principles of nuclear structure that are important to the understanding of cross-section behavior. Separate chapters follow that describe specific techniques for measuring cross sections along with experimental results involving fast neutrons, resonance neutrons, resonances in fissionable materials, and thermal neutrons.
Author : V. Pronyaev
Publisher :
Page : 112 pages
File Size : 20,15 MB
Release : 1995
Category : Neutron cross sections
ISBN :
Author :
Publisher :
Page : 150 pages
File Size : 39,99 MB
Release : 1962
Category : Neutron cross sections
ISBN :
Author :
Publisher :
Page : pages
File Size : 18,27 MB
Release : 1975
Category :
ISBN :
We have measured total cross sections for neutrons on protons, deuteriom, beryllium, carbon, aluminium, iron, copper, cadmium, tungsten, lead, and uranium for momenta between 30 and 300 GeV/ c . The measurements were carried out in a small-angle neutral beam at Fermilab. Typical accuracy of the data is 0.5 to 1%. The cross sections are consistent with an A 0.77±0.01 dependence over the entire momentum range. The cross sections are compared with theoretical predictions. Agreement is found only if inelastic screening is included. Nuclear radii obtained from our data are in good agreement with previous determinations.
Author : James DeJuren
Publisher :
Page : 24 pages
File Size : 48,74 MB
Release : 1950
Category : Bismuth
ISBN :
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.