Abstract
Electromagnetic dissociation of $^{197}\mathrm{Au}$ target nuclei by the Coulomb field of relativistic heavy ions (RHI) was inferred from measurements of $^{197}\mathrm{Au}(\mathrm{RHI},X)^{196}\mathrm{Au}$ cross sections. RHI represents 2.1-GeV/nucleon $p$, $^{12}\mathrm{C}$, or $^{20}\mathrm{Ne}$, 1.8-GeV/nucleon $^{40}\mathrm{Ar}$, or 1.7-GeV/nucleon $^{56}\mathrm{Fe}$ projectiles. The experimental cross sections in excess of the estimated nuclear contributions are well described by use of the Weizs\acker-Williams method for calculating the electromagnetic dissociation contributions. Electromagnetic-dissociation calculations are given for $^{197}\mathrm{Au}$ projectiles at energies expected for the new generation of heavy-ion colliders.
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