Probing the quantum-mechanical equivalent-photon spectrum for electromagnetic dissociation of relativistic uranium projectiles

Authors: Th. Rubehn W.F.J. Müller, and W. Trautmann
Published: Phys. Rev. C56(1997)1165 [->Spires]
Preprint LBNL-39661, December 1996
Preprint nucl-ex/9612002
Abstract: Electromagnetic fission cross sections for the reactions U + (Be, C, Al, Cu, In, Au, U) at E/A = 0.6 and 1.0 GeV are compared to theoretical calculations using recently proposed quantum-mechanical equivalent-photon spectra. In contrast to semi-classical calculations, systematically lower cross sections are obtained that cannot reproduce the experimental results. Furthermore, we point out that the study of electromagnetic fission cross sections or electromagnetic 1-neutron removal cross sections alone cannot provide unambiguous information on the excitation of the double giant dipole resonance.
Paper: Postscript 4 pages with 1 embedded figures (215 kb)
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