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Photofission of heavy nuclei at energies up to 4 GeV | | C. Cetina
; B. L. Berman
; W. J. Briscoe
; P. L. Cole
; G. Feldman
; P. Heimberg
; L. Y. Murphy
; S. Philips
; J. C. Sanabria
; Hall Crannell
; A. Longhi
; D. I. Sober
; G. Ya. Kezerashvili
; | | Date: |
7 Apr 2000 | | Journal: | Phys.Rev.Lett. 84 (2000) 5740-5743 | | Subject: | nucl-ex | | Affiliation: | The George Washington University, The Catholic University of America, Budker Institute of Nuclear Physics | | Abstract: | 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%, implying the presence of important processes that compete with fission. We also observe that the relative photofission cross sections do not depend strongly on the incident photon energy over this entire energy range. If we assume that for 237Np the photofission probability is equal to unity, we observe a significant shadowing effect starting below 1.5 GeV. | | Source: | arXiv, nucl-ex/0004004 | | Services: | Forum | Review | PDF | Favorites | |
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