Photon scattering on U238 and the interpretation of near-threshold photofission resonances

Y. Birenbaum, Ricardo Alarcon, S. D. Hoblit, R. M. Laszewski, A. M. Nathan

Research output: Contribution to journalArticle

7 Scopus citations


Cross sections for photon elastic scattering have been measured for U238 between 4.8 and 6.4 MeV with an energy resolution of about 50 keV. These data have been used along with existing photofission data to infer the total photoabsorption cross section T and the fission transmission coefficient Tf below neutron threshold. We find that the inferred T varies smoothly with energy and generally follows the extrapolated tail of the giant dipole resonance, and that Tf shows a broad bump between 5.6 and 5.9 MeV. These results strongly support the contention that resonances seen in near-threshold photofission cross sections are due to the fission and not the photon channel.

Original languageEnglish (US)
Pages (from-to)1293-1297
Number of pages5
JournalPhysical Review C
Issue number4
Publication statusPublished - 1987
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

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