Cross Sections for Neutron-producing Reactions Induced by 6- and 10-MeV Neutrons Incident on 10B and 11B PDF Download
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Author: Manfred Drosg
Publisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 48
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Book Description
Author: Manfred Drosg
Publisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 48
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Using the time-of-flight technique, the 1°B and 11B neutron emission spectra at incident neutron energies of 6.00 and 10.00 MeV for angles between 20° and 145° have been measured. Double differential cross sections and their integrated values have been extracted and are presented in tables and graphs. The integrated values (corrected for charged particle cross sections, if necessary) are in excellent agreement with measured total cross sections. 15 refs., 39 figs., 14 tabs.
Author:
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Category :
Languages : en
Pages :
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Book Description
Using the time-of-flight technique, we have measured neutron emission spectra for 6Li, 7Li, 1°B, 11B and carbon at an incident neutron energy of 14.1 MeV and at 10 angles between 30° and 143°. Double differential cross sections and their integrated values have been extracted and are presented in tables and graphs. The nonelastic portion of the neutron emission spectra is noticeably higher than expected which may be due to uncertainties in the input library (ENDF/B-IV) used in the Monte Carlo correction for multiple scattering. In particular, the library for 11B appears to be very unrealistic with an integrated elastic cross section which should be higher by 50%. 20 refs., 1 fig., 12 tabs.
Author: Manfred Drosg
Publisher:
ISBN:
Category : Neutron cross sections
Languages : en
Pages : 54
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Author: James DeJuren
Publisher:
ISBN:
Category : Bismuth
Languages : en
Pages : 24
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Book Description
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: Victoria McLane
Publisher: Elsevier
ISBN: 0323142222
Category : Science
Languages : en
Pages : 850
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Book Description
Neutron Cross Sections, Volume 2: Neutron Cross Section Curves presents data for total reaction cross sections and related fission parameters as a function of incident-neutron energy. This book covers energy range from 0.01 eV to 200 MeV to exclude crystalline and magnetic effects for slow neutrons and relativistic effects for high energy neutrons. The data in this volume are grouped into sections corresponding to the element of the target nucleus in the neutron-induced reaction. These sections are ordered in increasing atomic number. Within a section, graphical data are presented for the natural element followed by the isotopes of that element in order of increasing atomic mass. A list of the reaction types is provided at the end of each section. This book also provides graphical section, wherein each graphical page is annotated on the outer edge with a symbol for an element or isotope followed by the list of the cross section data for that element or isotope. The data plotted in the graphical section are tagged by a mnemonic consisting of year, laboratory, and author's last name. This tag can be used to find the corresponding reference on the bibliographic pages.
Author: B. D. Kern
Publisher:
ISBN:
Category : Neutron cross sections
Languages : en
Pages : 42
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Author: R. J. Howerton
Publisher:
ISBN:
Category : Neutron cross sections
Languages : en
Pages : 492
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Time-of-flight techniques were used to measure the 6Li and 7Li neutron emission spectra at incident neutron energies of 5.96 and 9.83 MeV and at 10 angles from 25° to 144°. Differential elastic and inelastic cross sections as well as continuum cross sections that result from three-body breakup and inelastic scatering from unresolved states are presented. 10 figures, 5 tables.
Author: Devereux L. Kavanagh
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 162
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Book Description
