Gamma Ray Production Cross Section from Energetic Neutron Inelastic Scattering for Methodical Improvements in Planetary Gamma-ray Spectroscopy
Gamma Ray Production Cross Section from Energetic Neutron Inelastic Scattering for Methodical Improvements in Planetary Gamma-ray Spectroscopy

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Published: 1991

Total Pages: 11

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Planetary Gamma ray spectroscopy can be used to chemically analyze the top soil from planets in future planetary missions. The production from inelastic neutron interaction plays an effective role in the determination on the C and H at the surface. The gamma ray production cross section from the strongest lines excited in the neutron bombardment of Fe have been measured by the use of a time analyzed quasi-mono-energetic neutron beam and a high purity germanium detector. The results from En=6.5, 32, 43, and 65 MeV are presented.

Cross Section Standards for Neutron-induced Gamma-ray Production in the MeV Energy Range
Cross Section Standards for Neutron-induced Gamma-ray Production in the MeV Energy Range

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Published: 2004

Total 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.

Neutron-induced Gamma-ray Production Cross Sections for Silicon and Tungsten
Neutron-induced Gamma-ray Production Cross Sections for Silicon and Tungsten

Author: W. E. Tucker

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Published: 1969

Total Pages: 122

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Experimental measurements of the differential cross sections for the production of gamma rays in natural silicon and tungsten in the energy range from 5.0 to 11.0 MeV are presented. Theoretical calculations of the production cross sections for silicon, based on statistical theory and the Satchler formalism, with modifications by Moldauer, have been made, and comparisons of these calculations and other nuclear model calculations with experiment are discussed.

Gamma Ray Production Cross Sections
Gamma Ray Production Cross Sections

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Published: 1964

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Gamma production cross sections are presented as a function of l6 neutron lethargy groups and 11 photon energy groups for 13 elements and isotopes. They were computed by the program GAMMA-P and account for the production of gamma rays by neutron radiative capture, neutron inelastic scattering, neutron induced fissioning, and (n, alpha) reactions. (auth).