Integral Measurements to Test Neutron Scattering and Gamma-Ray Production Cross Sections for Be, C, N, H2O, and Fe PDF Download
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Author: L Harris (Jr)
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Category :
Languages : en
Pages : 304
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Book Description
Incident-neutron-energy-dependent measurements of scattered neutrons and secondary gamma rays for small samples of Be, C, N, H2O, and Fe have been performed at four scattering angles (30, 55, 90 and 125 degrees). The pulsed-white-neutron source, time-of-flight (TOF) method, and NE-213 detector with pulse-shape discrimination, three-parameter data acquisition with an online computer and spectrum unfolding were used to measure incident-neutron-energy-dependent, count rates and energy spectra of scattered neutrons (E sub n> 1 MeV) and secondary gamma rays (E sub gamma> 1 MeV) for incident neutron energies from 2 to 20 MeV. The measurements provide high sensitivity tests for integral and differential neutron scattering and gamma-ray production cross sections when compared with appropriate transport calculations. Differences between measurements and calculations should be interpretable in terms of specific cross-section deficiencies at well-defined incident-neutron energies from 2 to 20 MeV. The source spectrum of neutrons incident on the samples was measured by TOF using the NE-213 detector. (Author).
Author: L Harris (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 304
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Book Description
Incident-neutron-energy-dependent measurements of scattered neutrons and secondary gamma rays for small samples of Be, C, N, H2O, and Fe have been performed at four scattering angles (30, 55, 90 and 125 degrees). The pulsed-white-neutron source, time-of-flight (TOF) method, and NE-213 detector with pulse-shape discrimination, three-parameter data acquisition with an online computer and spectrum unfolding were used to measure incident-neutron-energy-dependent, count rates and energy spectra of scattered neutrons (E sub n> 1 MeV) and secondary gamma rays (E sub gamma> 1 MeV) for incident neutron energies from 2 to 20 MeV. The measurements provide high sensitivity tests for integral and differential neutron scattering and gamma-ray production cross sections when compared with appropriate transport calculations. Differences between measurements and calculations should be interpretable in terms of specific cross-section deficiencies at well-defined incident-neutron energies from 2 to 20 MeV. The source spectrum of neutrons incident on the samples was measured by TOF using the NE-213 detector. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 113
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Book Description
Measurements of neutron elastic and inelastic scattering and gamma- ray production have been made on several elements with 9.0 and 11.0 MeV incident neutrons. Differential cross sections for N, O, Al, Si, Ca, and Fe are presented and integral cross sections derived from the data are also given.
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Category : Aeronautics
Languages : en
Pages : 1004
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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Category :
Languages : en
Pages : 27
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Author:
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Category : Power resources
Languages : en
Pages : 480
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Author: David T. Goldman
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ISBN:
Category : Neutron cross sections
Languages : en
Pages : 732
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Author:
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Category :
Languages : en
Pages : 5
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Gamma-ray cross section standards for neutron-induced reactions are important in enabling the accurate determination of absolute cross sections from relative measurements of gamma-ray production. In our work we observed a need for improvement in these standards. In particular there are large discrepancies between evaluations of the {sup nat}Fe(n, n1'[gamma]) cross section for the 847-keV gamma ray. We have performed (1) absolute cross section measurements, (2) measurements relative to the {sup nat}Cr(n, n1'[gamma]) 1434-keV gamma ray, and (3) comparisons using measured total and elastic scattering cross sections to refine our knowledge of the Fe cross section and the closely linked inelastic channel cross section for Fe. Calculation of integral tests of the cross section libraries may indicate that adjustment of the angular distributions of the neutron elastic and inelastic scattering may be needed.
Author: M. R. Bhat
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ISBN:
Category : Gamma rays
Languages : en
Pages : 80
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Author: Friedrich Voss
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ISBN:
Category :
Languages : en
Pages : 11
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![Measurement of High Resolution [gamma]-ray Production Cross Sections in Inelastic Neutron Scattering on Al and Fe Between 0.8 and 13 MeV PDF](https://books.google.com/books/content/images/frontcover/FbwKmwEACAAJ?fife=w80-h100)
Author: Friedrich Voss
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ISBN:
Category :
Languages : en
Pages : 11
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