XUV PHOTOABSORPTION OF LASER-GENERATED AU VAPOR

Photoabsorption by atomic Au in the 5p and 4f excitation region has be en studied using the dual laser plasma DLP technique. The observed fea tures are dominated by two prominent Fano-type resonance lines which c an be attributed to 5p --> 5d and 4f --> 5d transitions of valence exc ited 5d(9)6s(2)(D-2(5/2)) AU followed by autoionization. The experimen tal results are compared to spectra calculated for the excitation of 5 d(10)6s(1)(S-2(1/2)) ground and 5d(9)6s(2)(D-2(5/2), D-2(3/2)) valence -excited states within the (R)Hartree-Fock theory and the relativistic time dependent local density approximation.