Accession Number : ADA314903

Title :   Relative Photofission Cross Sections of Several Fissionable Materials,

Corporate Author : ATOMIC ENERGY COMMISSION WASHINGTON DC

Personal Author(s) : McElhinney, John ; Ogle, William

PDF Url : ADA314903

Report Date : FEB 1949

Pagination or Media Count : 23

Abstract : The photofission excitation curve of U(238) up to 21 Mev has been measured. An attempt has been made to determine the photofission cross section shape as a function of energy, making appropriate assumptions as to the X-ray spectrum of the betatron. It was not possible to obtain a unique solution for the cross section shape, but two possible solutions are given, both of which have a resonance peak at about 15 Mev. The photofission yield of several fissionable materials relative to U(238) has been measured in the region of the resonance. The relative yields per atom for the substances under investigation are U(235), 1.49; pU(239), 2.51; U(233), 2.49; Th(232), 0.257; I0(230), 0.847; U(238), 1.00.

Descriptors :   *FISSION PRODUCT ACTIVITY, PEAK VALUES, X RAY SPECTRA, RESONANCE, CROSS SECTIONS, FISSIONABLE MATERIALS, URANIUM, PLUTONIUM, PHOTOELECTRIC EFFECT(GAMMA RAYS).

Subject Categories : Radioactiv, Radioactive Wastes & Fission Prod
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE