TY - JOUR A1 - Rafelski, Johann A1 - Fulcher, Lewis P. A1 - Greiner, Walter T1 - Superheavy elements and an upper limit to the electric field strength T2 - Physical review letters N2 - An upper limit to the electric field strength, such as that of the nonlinear electrodynamics of Born and Infeld, leads to dramatic differences in the energy eigenvalues and wave functions of atomic electrons bound to superheavy nuclei. For example, the 1s1/2 energy level joins the lower continuum at Z=215 instead of Z=174, the value obtained when Maxwell's equations are used to determine the electric field. Y1 - 2006 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2524 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-28725 VL - 27 IS - 14 SP - 958 EP - 961 ER -