Accession Number : AD0704792

Title :   GAMMA-RAY SPECTRA ARISING FROM FAST-NEUTRON INTERACTIONS IN ELEMENTS FOUND IN SOILS, CONCRETES, AND STRUCTURAL MATERIALS,

Corporate Author : OAK RIDGE NATIONAL LAB TENN

Personal Author(s) : Maerker,R. E. ; Muckenthaler,F. J.

Report Date : APR 1970

Pagination or Media Count : 242

Abstract : Experimental data are presented for the production of secondary gamma rays arising from the interaction of a fission-like spectrum of fast neutrons with oxygen, carbon, iron, aluminum, copper, zinc, titanium, nickel, silicon, calcium, potassium, sodium, barium, sulfur, and a stainless steel. These data are useful in evaluating the accuracy of (n,x gamma) cross-section sets. The data are differential in the gamma-ray energy from 1 MeV to approximately 6.5 MeV and are expressed as values for 4 pi times the average differential gamma-ray production cross section at 90 deg to the incident neutron beam for all neutrons in the beam lying above 1 MeV. These results are estimated to have an accuracy of plus or minus 30% and include the contribution from both discrete and continuum gamma rays. Very approximate experimental data are presented for gamma rays arising from resonance capture of neutrons from a 1/E energy spectrum in the energy range 10-200 keV. (Author)

Descriptors :   (*SHIELDING, NEUTRON REACTIONS), (*NEUTRON REACTIONS, *GAMMA RAY SPECTRA), FAST NEUTRONS, DIFFERENTIAL CROSS SECTIONS, OXYGEN, CARBON, IRON, ALUMINUM, COPPER, ZINC, TITANIUM, NICKEL, SILICON, CALCIUM, POTASSIUM, SODIUM, BARIUM, SULFUR, STAINLESS STEEL

Subject Categories : Nuclear Radiation Shield, Protection & Safety
      Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE