Gamma-ray Production Due to Neutron Interactions with Zinc. Tabulated Differential Cross Sections for 31 Gamma Rays for Incident Neutron Energies Between 0.9 and 6 MeV.
Gamma-ray Production Due to Neutron Interactions with Zinc. Tabulated Differential Cross Sections for 31 Gamma Rays for Incident Neutron Energies Between 0.9 and 6 MeV.

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Publisher:

Published: 1974

Total Pages:

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Numerical values of differential cross section for gamma rays produced by neutron interactions with zinc were measured for neutron energies between 0.9 and 6 MeV for sigma = 120 deg. The d sigma /d omega data were obtained using a 35 cm/sup 3/ Ge(Li) detector. The data consist of cross section values for 31 gamma rays having E/sub gamma / between 300 and =780 keV. Neutron energy intervals varied between a minimum of ~50 keV at E/sub n/, ~ 900 keV and a maximum of ~1.5 MeV for E/sub n/ ~ 5.8 MeV. (auth).

Analysis of a Neutron Scattering and Gamma-ray Production Integral Experiment on Aluminum for Neutron Energies from 1 to 15 MeV.
Analysis of a Neutron Scattering and Gamma-ray Production Integral Experiment on Aluminum for Neutron Energies from 1 to 15 MeV.

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Published: 1978

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Monte Carlo calculations were made to analyze the results of an integral experiment with an aluminum sample to determine the adequacy of ENDF/B-IV neutron scattering and gamma-ray production cross-section data for aluminum. The experimental results analyzed included energy-dependent NE-213 detector neutron and gamma-ray count rates at a scattering angle of 125 deg and pulse-height spectra for scattered neutrons and gamma-rays. The experiments were carried out with the ORELA 1- to 20-MeV pulsed neutron source. The pulse-height data were unfolded to generate secondary neutron and gamma-ray spectra at 125 deg as a function of incident neutron energy. Multigroup Monte Carlo calculations using the MORSE code and ENDF/B-IV cross sections were made to analyze all reported results. Discrepancies between calculated and measured responses were found for secondary neutron scattering data above 10 MeV and for gamma-rays produced at energies between 4 and 7 MeV. A detailed analysis has not yet been performed to determine the reasons for these discrepancies.

Gamma Rays Resulting from Interactions of 14.7 Mev Neutrons with Magnesium, Aluminum, Calcium, Titanium and Iron
Gamma Rays Resulting from Interactions of 14.7 Mev Neutrons with Magnesium, Aluminum, Calcium, Titanium and Iron

Author: William E. Thompson

Publisher:

Published: 1965

Total Pages: 32

ISBN-13:

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The prompt gamma rays resulting from the interaction of 14.7 MeV neutrons with the nuclei of the elements magnesium, aluminum, calcium, titanium and iron have been investigated. Cross sections for the production of many of these gamma rays have been measured by observing them with a carefully shielded detector during neutron bombardment of a given elemental sample. It is found that the n, n'-gamma process predominates and that gamma rays resulting from the deexcitation of the lowest energy levels, with one or two notable exceptions, are generally most prominent. Other processes including n, p-gamma, n, alpha-gamma, and n, d-gamma are also observed. Some of the most improtant gamma rays are found to have the following elemental production cross sections (in millibarns per steradian at 90 deg): 1:37 Mev gamma ray from Mg, 30. 9= 3.1; 1.81 MeV gamma ray from Al, 13.7= 2.0; 3.73 Mev gamma ray from Ca, 9.0= 1.4; 0.99 Mev gamma ray from Ti, 51.9= 5.2; and 0.85 MeV gamma ray from Fe, 57.6= 5.8. (Author).

Neutrons and Related Gamma Ray Problems / Neutronen und Verwandte Gammastrahlprobleme
Neutrons and Related Gamma Ray Problems / Neutronen und Verwandte Gammastrahlprobleme

Author: Edoardo Amaldi

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 874

ISBN-13: 364245920X

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661 tures, such as occurs in stellar atmospheres and in thermonuc1ear processes, will not be considered 1. Because photoelectric absorption predominates completely at low photon energies, and penetration theory is elementary under these conditions, attention is directed in this artic1e to photon energies above ""20 kev. On the high energy side, this artic1e does not cover the cascade shower processes which are dealt 2 with in cosmic ray studies • In this connection it is recalled that the cascade shower process, which involves electrons and positrons besides X rays, becomes predominant above 10 Mev in heavy elements, and above 100 Mev in light ones. Theories developed for the study of cascade showers in cosmic rays rely on assumptions about the prob ability of interactions with matter which are adequate only at energies of the order of 1 Gev or more. Below this energy there is a gap in which penetration phenomena are qualitatively known and understood but have not yet been calculated in detail. A few detailed experimental studies which have been made at energies up to 300 Mev will be reviewed in this article.