Cross sections and partial kerma factors for elastic and inelastic neutron scattering from nitrogen, oxygen and calcium at En=21.6 MeV

• Published in: Physics in medicine & biology Vol. 35; no. 9; pp. 1255 - 1270
• Main Authors: Olsson, N, Ranstrom, E, Trostell, B
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.09.1990; Institute of Physics
• Subjects: Calcium; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Fast Neutrons; Models, Theoretical; Neutron diffraction and scattering; Nitrogen; Oxygen; Physics; Scattering, Radiation; Structure of solids and liquids; crystallography; Oxygen; Calcium; Neutron scattering; Nitrogen; Cross section (collision)
• ISSN: 0031-9155; 1361-6560
• DOI: 10.1088/0031-9155/35/9/006

The Studsvik high-resolution, low-background time-of-flight facility has been used to measure differential neutron scattering cross sections for nitrogen, oxygen and calcium at a neutron energy of 21.6 MeV. Angular distributions in the range 10 degrees-160 degrees have been measured for both elastic and inelastic scattering from some low-lying levels in the three nuclei. Angle-integrated cross sections have been determined by fitting Legendre polynomial expansions to the differential data. Partial kerma factors for elastic and inelastic scattering have been deduced from these fits. Analyses in terms of the spherical optical model and the distorted-wave Born approximation have provided information on potential parameters and deformations, which have been used to calculate cross sections and partial kerma factors. Comparisons have been made with other recent data sets and model predictions, as well as with the evaluated neutron data file ENDF/B-V.