Neutron Multiplication in Beryllium
Abstract
Integral neutron multiplication experiments have been 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1988
- Accession Number
- ADA196877
Entities
People
- Richard S. Hartley
Organizations
- Air Force Institute of Technology