Efficient three-step, two-color ionization of plutonium using a resonance enhanced 2-photon transition into an autoionizing stateP. Kunz, G. Huber, G. Passler and N. TrautmannEur. Phys. J. D, 29 2 (2004) 183-188DOI: https://doi.org/10.1140/epjd/e2004-00024-4