L- and M-shell x-ray production cross sections of neodymium, gadolinium, holmium, ytterbium, gold, and lead by 25-MeV carbon and 32-MeV oxygen ions

L- and M-shell x-ray production cross sections were measured for thin solid targets of neodymium, gadolinium, holmium, ytterbium, gold, and lead by 25-MeV 12C/sup q+/ (q = 4,5,6) and by 32-MeV 16O/sup q+/ (q = 5,7,8). The cross sections were determined from measurements made with thin targets (<2.5 μg/cm2). For projectiles with one or two K-shell vacancies, the target x-ray production cross sections were found to be enhanced over those for projectiles without a K-shell vacancy. The sum of direct ionization to the continuum (DI) plus electron capture (EC) to the L, M, N... shells and EC to the K shell of the projectile were extracted from the data. The results are compared to the predictions of first Born theories, i.e., plane-wave Born approximation for DI and Oppenheimer-Brinkman-Kramers formula of Nikolaev for EC and to the ECPSSR approach that accounts for energy loss and Coulomb deflection of the projectile as well as for relativistic and perturbed stationary states of inner-shell electrons