Measurements of neutron elastic and inelastic scattering cross sections from 54Fe were performed for nine incident neutron energies between 2 and 6 MeV. Measured differential scattering cross sections are compared to those from previous measurements and the ENDF, JENDL, and JEFF data evaluations. TALYS calculations were performed and modifications of the default parameters are found to better describe the experimental cross sections. A spherical optical model treatment is generally adequate to describe the cross sections in this energy region; however, in 54Fe the direct coupling is found to increase suddenly above 4 MeV and requires an increase in the DWBA deformation parameter by approximately 25%. This has little effect on the elastic scattering differential cross sections but makes a significant improvement in both the strength and shape of the inelastic scattering angular distribution, which are found to be very sensitive to the size and extent of the surface absorption region.
|Number of pages
|Nuclear Physics A
|Published - Apr 2018
Bibliographical noteFunding Information:
Research at the University of Kentucky Accelerator Laboratory is supported by contracts from the U.S. Department of Energy NNSA-SSAP award NA-0002931 and Nuclear Energy Universities Program award NU-12-KY-UK-0201-05 , the U.S. National Isotope Development Program, and the Cowan Physics Fund at the University of Dallas. The authors also acknowledge the many contributions of H.E. Baber to these measurements.
- Coupled channels
- Differential cross sections
- Neutron elastic and inelastic scattering
ASJC Scopus subject areas
- Nuclear and High Energy Physics