Atomiclike behavior of the Mo 4dphotoionization cross section in Mo islands grown on Al

Abstract
The Mo 4d photoionization cross section has been measured, apart from a constant factor, in the photon energy range 63200 eV from samples consisting of Mo islands grown on Al at 80 K. Within the experimental error the photoionization cross section is in basic agreement with the atomic calculations, in spite of the fact that a considerable d-d interaction between nearby Mo atoms is present. The problems raised by the present results are discussed in connection with the physics of clusters.