Neutron multiplication in beryllium. Doctoral thesis
Technical Report
·
OSTI ID:6985531
Integral neutron multiplication experiments were performed using homogeneous spherical shells of beryllium metal of 4.6-, 6.99-, 7.87-, 9.38-, 13.8-, and 19.9-cm thickness. Neutron leakage, produced by Cf-252 and DT neutron sources placed in the center of the shells, were measured with a Bonner-sphere spectrometer system. The rate of DT neutron production was normalized using an associated particle system placed inside the target assembly, which was inserted into the shells via a reentrant hole. The neutron fluence was obtained by processing the room-returned and air-scattered corrected count-rate data with a Bonner-sphere-spectrum unfolding routine and a weighted Bonner-sphere technique. The neutron multiplication was obtained directly by comparing the normalized neutron-leakage fluence with and without beryllium present. The neutron-leakage spectra were calculated for each shell using the discrete ordinates codes ANISN and ONEDANT using ENDF/B-IV and ENDF/B-V respectively.
- Research Organization:
- Air Force Inst. of Tech., Wright-Patterson AFB, OH (USA)
- OSTI ID:
- 6985531
- Report Number(s):
- AD-A-196877/5/XAB; AFIT/CI/NR-88-59
- Country of Publication:
- United States
- Language:
- English
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Neutron multiplication in beryllium
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Thesis/Dissertation
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Wed Dec 31 23:00:00 EST 1986
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Measurements and calculations of the leakage multiplication from hollow beryllium spheres
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Related Subjects
654003* -- Radiation & Shielding Physics-- Neutron Interactions with Matter
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
BARYON REACTIONS
BARYONS
BERYLLIUM
DISCRETE ORDINATE METHOD
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
GRAPHS
HADRON REACTIONS
HADRONS
MEASURING INSTRUMENTS
METALS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PARTICLES
PRODUCTION
SHELLS
SPECTRA
SPECTROMETERS
SPHERES
TARGETS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
BARYON REACTIONS
BARYONS
BERYLLIUM
DISCRETE ORDINATE METHOD
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
GRAPHS
HADRON REACTIONS
HADRONS
MEASURING INSTRUMENTS
METALS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PARTICLES
PRODUCTION
SHELLS
SPECTRA
SPECTROMETERS
SPHERES
TARGETS