Accession Number : AD0689840

Title :   MEASUREMENT OF NEUTRON PENETRATION STANDARDS. VOLUME II. HIGH RESOLUTION MEASUREMENTS OF THE TOTAL NEUTRON CROSS SECTIONS OF NITROGEN AND IRON.

Descriptive Note : Final technical rept.,

Corporate Author : GULF GENERAL ATOMIC INC SAN DIEGO CALIF

Personal Author(s) : Carlson,A. D. ; Cerbone,R. J. ; Willoughby,D. F.

Report Date : 27 MAR 1969

Pagination or Media Count : 123

Abstract : A comprehensive study has been made of the neutronic behavior in iron. The research comprised measurements of the neutron angular flux spectrum from approximately 1 keV to 10 MeV in a 76.2-cm-diameter iron sphere, the gamma-ray spectrum from 0.20 to 10.0 MeV in the same bulk assembly, and the gamma-ray time distribution. In addition, the total cross section of iron has been measured from 0.5 MeV to 10 MeV with a 0.035 nsec/m resolution. The neutron angular flux spectra are compared to a series of discrete-ordinates transport calculations using ENDF/B, P3 cross sections in both 29- and 49-group representations. Both calculations indicate that the present ENDF/B data for iron are wrong by as much as fifty percent in some energy regions. (Author)

Descriptors :   (*IRON, *NEUTRON CROSS SECTIONS), (*NITROGEN, NEUTRON CROSS SECTIONS), NEUTRON TRANSPORT THEORY, SHIELDING, RADIATION MEASURING INSTRUMENTS

Subject Categories : Nuclear Radiation Shield, Protection & Safety
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE