Accession Number : AD0691903

Title :   GAMMA-RAY SPECTRA ARISING FROM THERMAL-NEUTRON CAPTURE 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 : AUG 1969

Pagination or Media Count : 267

Abstract : Gamma-ray spectra arising from the capture of thermal neutrons are presented for iron, aluminum, copper, zinc, titanium, nickel, silicon, calcium, potassium, sodium, barium, chlorine, sulfur, and stainless steel. The spectral intensities in photons per 100 captures are presented as both individual lines and as sums of these lines over 0.5-MeV intervals which are intended for use in shielding calculations. The latter results have an estimated accuracy of plus or minus 15%, and include the contributions from both discrete and continuum gamma rays. Comparisons of these spectra are made with previously determined spectra, as well as with values reported in the Reactor Handbook, and considerable revision in the latter is concluded to be necessary. The present results do not go below 1 MeV, but when the relatively small contributions from energies less than 1 MeV are added to them, binding energy checks within plus or minus 5% are obtained. (Author)

Descriptors :   (*NEUTRON CAPTURE GAMMA RAYS, *GAMMA RAY SPECTRA), (*SHIELDING, GAMMA RAY SPECTRA), THERMAL NEUTRONS, REACTOR SHIELDING MATERIALS, GAMMA RAY SCATTERING, NUCLEAR CROSS SECTIONS, MONTE CARLO METHOD, CONCRETE, SOILS, CONSTRUCTION MATERIALS, IRON, ALUMINUM, COPPER, ZINC, TITANIUM, NICKEL, SILICON, CALCIUM, POTASSIUM, SODIUM, BARIUM, CHLORINE, SULFUR, STAINLESS STEEL, TABLES(DATA)

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE