  L shell line and total x-ray production cross sections in 78Pt, 79Au, 82Pb,
83Bi, 90Th, and 92U targets ionized by 4-6 MeV/u fluorine ions were measured.
These cross sections are compared with available theories for L shell
ionization using single- and multiple-hole fluorescence and the Coster-Kronig
yields. The ECPSSR and the ECUSAR theories exhibit good agreement with the
measured data, whereas, the FBA theory overestimates them by a factor of two.
Although for the F ion charge states q = 6-8 the multiple-hole atomic
parameters do not significantly differ from the single-hole values, after an
account for the multiple-holes, our data are better in agreement with the
ECUSAR than the ECPSSR theory.
