Gamma-ray Production Cross Section Measurements Using a White Neutron Source from 1 to 400 MeV.
Gamma-ray Production Cross Section Measurements Using a White Neutron Source from 1 to 400 MeV.

Author:

Publisher:

Published: 1990

Total Pages: 15

ISBN-13:

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The continuous energy (white) neutron source at the Los Alamos Meson Physics Facility (LAMPF) is used to measure photon-production cross sections over a wide range of neutron energies. Detector systems have been or are being developed to measure gamma rays in the energy range from hundreds of keV up to several hundreds of MeV. In particular a high resolution Ge detector system is used to detect gamma rays from several hundred keV to over 6 MeV. A 5 crystal BGO detector system is used for measuring gamma-rays from 1 MeV to approximately 20 MeV. A large volume BGO detector with an active shield is used to measure gamma rays in the range from 5 to 40 MeV. We are presently developing a multi-element gamma-ray telescope to measure gamma rays with energies from 50 MeV up to several hundred MeV.

Integral Measurements to Test Neutron Scattering and Gamma-Ray Production Cross Sections for Be, C, N, H2O, and Fe
Integral Measurements to Test Neutron Scattering and Gamma-Ray Production Cross Sections for Be, C, N, H2O, and Fe

Author: L Harris (Jr)

Publisher:

Published: 1975

Total Pages: 304

ISBN-13:

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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).

Measurement of Gamma-ray Production Cross Sections for Nitrogen and Oxygen
Measurement of Gamma-ray Production Cross Sections for Nitrogen and Oxygen

Author: Victor John Orphan

Publisher:

Published: 1969

Total Pages: 114

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A gamma-ray production cross section measurement facility is described in this report. This facility uses a LINAC as a neutron source and a Ge(Li) as the gamma detector. The facility was used to measure the gamma-ray production cross sections of nitrogen and oxygen for incident neutron energies of up to 16 MeV. The results are tabulated, graphed, and compared with other measurements. (Author).

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

Publisher:

Published: 1969

Total Pages: 122

ISBN-13:

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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.