Relative Photofission Cross Sections of Several Fissionable Materials,
ATOMIC ENERGY COMMISSION WASHINGTON DC
Pagination or Media Count:
The photofission excitation curve of U238 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 U238 has been measured in the region of the resonance. The relative yields per atom for the substances under investigation are U235, 1.49 pU239, 2.51 U233, 2.49 Th232, 0.257 I0230, 0.847 U238, 1.00.
- Radioactivity, Radioactive Wastes and Fission Products
- Nuclear Physics and Elementary Particle Physics