Investigation of resonant photoemission in Gd with x-ray linear dichroism

The constructive summing of direct and indirect channels above the absorpti on threshold of a core level can cause a massive increase in the emission c ross section, leading to a phenomenon called "resonant photoemission." Usin g novel magnetic linear dichroism in angular distribution photoelectron spe ctroscopy experiments and theoretical simulations, we have probed the natur e of the resonant photoemission process in Gd metal. It now appears that te mporal matching as well as energy matching is a requirement for true resona nt photoemission. (C) 1999 American Vacuum Society. [S0734-2101(99)10004-6] .