Photofission of heavy nuclei at energies up to 4 GeV.

  title={Photofission of heavy nuclei at energies up to 4 GeV.},
  author={C. Cetina and Barry L. Berman and William J. Briscoe and Philip Lawrence Cole and Gerald Feldman and Peter C. Heimberg and L. Y. Murphy and S. A. Philips and J. C. Sanabria and H. L. Crannell and A. Longhi and Daniel I. Sober and G. Ya. Kezerashvili},
  journal={Physical review letters},
  volume={84 25},
Total photofission cross sections for 238U, 235U, 233U, 237Np, 232Th, and natPb have been measured simultaneously, using tagged photons in the energy range Egamma=0.17-3.84 GeV. This was the first experiment performed using the Photon Tagging Facility in Hall B at Jefferson Lab. Our results show that the photofission cross section for 238U relative to that for 237Np is about 80% over the entire energy range, implying the presence of important processes which compete with fission. If we assume… 

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