T. Aumann et al., EXCITATION OF THE 2-PHONON GIANT-DIPOLE RESONANCE IN U-238 STUDIED VIA INCLUSIVE MEASUREMENTS OF NEUTRON-REMOVAL CROSS-SECTIONS, Nuclear physics. A, 599(1-2), 1996, pp. 321-326
As part of a comprehensive study of uranium fragmentation at relativis
tic energies at the GSI projectile fragment separator, FRS, inclusive
neutron-removal cross sections have been measured for several sn chann
els at projectile energies of 600 and 950 A MeV. The electromagnetic c
ross sections agree surprisingly well with a semiclassical calculation
based on measured photonuclear cross sections and do not require an e
xtra enhancement of the two-phonon giant dipole excitation as conclude
d from similar measurements with Au-197.