Cross Sections for Products of 90-Mev Neutrons on Carbon
Author: Dimitri Alexander Kellogg
Publisher:
Published: 1952
Total Pages: 120
ISBN-13:
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Author: Dimitri Alexander Kellogg
Publisher:
Published: 1952
Total Pages: 120
ISBN-13:
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Publisher:
Published: 1947
Total Pages: 8
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DOWNLOAD EBOOKAuthor: M. Kalos
Publisher:
Published: 1956
Total Pages: 30
ISBN-13:
DOWNLOAD EBOOKA tabulation is made of total and elastic scattering cross sections together with Legendre coefficients for elastic angular distributions for neutron scattering by carbon, in the range 0.33 to 18.0 Mev.
Author: R. Fox
Publisher:
Published: 1950
Total Pages: 12
ISBN-13:
DOWNLOAD EBOOKThe measurement of 28O-Mev neutron cross sections of various nuclei is described. The neutron beam used results from 340-Mev protons in the 184-in. cyclotron striking a 2-in. Be target. The neutron detector consists of a double coincidence anthracene scintillation counter telescope which counts recoil protons scattered at 15 deg from a paraffin cylinder placed in the collimated neutron beam. A 2-in. Cu absorber placed between the counters assures that only protons of energy greater than 250 Mev are counted. The cross sections for all nuclei measured from Li to Pb are smaller than the corresponding cross sections measured at 90 Mev by factors between 0.5 and 0.6.
Author: Jerome Hudis
Publisher:
Published: 1960
Total Pages: 46
ISBN-13:
DOWNLOAD EBOOKThe literature has been searched for references pertaining to high energy reactions of interest to nuclear chemists. Nuclear Science Abstracts was the main source of references and wherever possible the complete abstract was retained.
Author:
Publisher:
Published: 1976
Total Pages: 658
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Published: 1975-11
Total Pages: 960
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DOWNLOAD EBOOKAuthor: C. L. Bailey
Publisher:
Published: 1946
Total Pages: 28
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DOWNLOAD EBOOKAuthor: James DeJuren
Publisher:
Published: 1950
Total Pages: 24
ISBN-13:
DOWNLOAD EBOOKThe 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.