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| Release | : 1972 |
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| Author | : V. C. Rogers |
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| Total Pages | : 47 |
| Release | : 1974 |
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Gamma-ray production cross sections were measured for the 12C(n, x gamma) and 14N(n, x gamma) reactions from 2.0- to 20.7-MeV neutron energy using the Rad Tech Linac source. The carbon cross sections are presented for both high neutron resolution and ten broad neutron groups spanning the energy range. Cross sections for the discrete gamma-ray peaks from nitrogen are presented in twelve broad neutron groups as are the discrete plus continuum cross sections obtained by unfolding the gamma-ray spectra. The measured cross sections generally agree with the evaluations and with previous measurements.
| Author | : M. R. Bhat |
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| Total Pages | : 80 |
| Release | : 1980 |
| Genre | : Gamma rays |
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| Total Pages | : 150 |
| Release | : 1962 |
| Genre | : Neutron cross sections |
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| Author | : Larry Harris (Jr) |
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| Total Pages | : 74 |
| Release | : 1972 |
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An integral experiment, designed to provide high-sensitivity tests for gamma-ray production and neutron-scattering cross sections, has been performed. The experiment is based on the white-source, pulsed-neutron, time-of-flight method with the sample at the detector end of the flight path. Measurements were made with a single 5 x 5 cm cylindrical NE-213 detector positioned at 30, 55, 90, and 125 degrees relative to the incident neutron beam. Pulse-shape discrimination was used to separate neutron and gamma-ray counts. Measured count rates due to secondary gamma rays and scattered neutrons from two sample materials, graphite and liquid nitrogen, are reported here as functions of time and incident neutron energy. Differences between calculated gamma-ray and neutron count rates and those reported here should be readily interpreted in terms of specific cross-section deficiencies at well defined incident neutron energies in the 1.5- to 20-MeV range. (Author).
| Author | : F. L. Keller |
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| Total Pages | : 56 |
| Release | : 1958 |
| Genre | : Gamma rays |
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| Release | : 1974 |
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| Release | : 1976 |
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Two integral experiments of neutron scattering and gamma-ray production from nitrogen samples performed at Intelcom Radiation Technology and Oak Ridge National Laboratory were analyzed with Monte Carlo calculations. The experimental results include angular-dependent NE-213 detector count rates for both scattered neutrons and gamma-ray production from a spherical dewar of liquid nitrogen pulsed with a neutron beam with energies from 1 to 20 MeV. Additional results were reported in the ORNL experiments for unfolded scattered neutron and gamma-ray production spectra as a function of detector angle in broad incident neutron energy bins. Multigroup Monte Carlo calculations were made to analyze all the reported results. Conclusions were drawn about the status of the ENDF/B- IV nitrogen cross-section data file from the comparison of calculated and experimental results. 1 table, 44 figures. (auth).
| Author | : A. D. Carlson |
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| Total Pages | : 80 |
| Release | : 1969 |
| Genre | : Gamma rays |
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| Release | : 1972 |
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