Transition from nonsequential to sequential double ionization in many-electron systems
Pullen, M. G., B. Wolter, X. Wang, X.-M. Tong, M. Sclafani, M. Baudisch, H. Pires, C. D. Schröter, J. Ullrich, T. Pfeifer, R. Moshammer, J. H. Eberly, and J. Biegert