Cross Sections for Nonelastic Interactions of 14Mev Neutrons with Various Elements
Abstract
The multiplication of neutrons by thin spherical shells of various materials surrounding a point source of 14Mev neutrons has been measured. A special long counter was used whose energy response is independent of neutron energy over a range of energies from about 1 Mev to 14 Mev. The transmission of primary energy neutrons through the shells has been measured with a transstilbene detector and values of the inelastic collision cross sections have been derived. The quantity σ_{n,2n}+2σ_{n,3n}σ_{c} is calculated, where σ_{n,2n} and σ_{n,3n} are the cross sections for (n, 2n) and (n, 3n) reactions and σ_{c} is the sum of the cross sections of all processes which destroy a neutron. Upper and lower limits are derived for σ_{n,2n}, σ_{c}, and σ_{is} (inelastic scattering) for all materials investigated. For a number of materials specific values for the cross sections are obtained.
 Publication:

Physical Review
 Pub Date:
 March 1955
 DOI:
 10.1103/PhysRev.97.1205
 Bibcode:
 1955PhRv...97.1205G