Energy-Loss-Straggling Experiments with Relativistic Heavy Ions in Solids

Energy-loss straggling measurements performed at the high-momentum-resolution magnetic spectrometer fragment separator with bare and highly charged {sub 8}O, {sub 54}Xe, {sub 79}Au, and {sub 92}U ions with specific kinetic energies (700{endash}1000)MeV/u are reported. The results are in good agreement with rigorous calculations recently reported by Lindhard and So/rensen and reveal systematic deviations from the well-known relativistic Bohr formula, which was obtained within the framework of the first-order Born approximation. {copyright} {ital 1996 The American Physical Society.}