Electron Capture and Ionization of Pb Ions at 33 TeV

We have measured the total cross sections for electron capture by bare Pb{sup 82+} ions and ionization of hydrogenlike Pb{sup 81+} ions at 33TeV (160 GeV/A , {gamma}=168 ) in solid targets of Be, C, Al, Cu, Sn, and Au. The total capture cross sections are dominated by electron capture from pair production and are compared with theoretical calculations. The 1s ionization cross sections obtained are significantly smaller than those predicted by Anholt and Becker [Phys.Rev.A {bold 36}, 4628 (1987)]. The Pb radiative lifetimes extended by {gamma}=168 have a strong effect on the survival probability of excited states against ionization in high-Z solid targets. {copyright} {ital 1998} {ital The American Physical Society}