1975 Ph.D University of Nebraska-Lincoln 1975-77 Post-doctoral position; Joint Institute for Laboratory Astrophysics (Boulder, CO) 1977-78 Lektorvikor; University of Århus (Århus, Denmark) 1978-79 Visiting scientist; Hahn-Meitner-Institut für Kernphysik (Berlin, Germany) 1980 Visiting assistant professor; Kansas State University (Manhattan, KS) 1981-95 Staff scientist; Pacific Northwest Laboratories (Richland, WA) 1989-90 Fulbright Fellow; Institut für Kernphysik der J.W. Goethe University (Frankfurt, Germany) 1995-2015 Professor of physics; Missouri University of Science and Technology; formerly named University of Missouri-Rolla (Rolla, MO) 2001-02 Visiting Professor; Albert Ludwig Universität Freiburg (Freiburg, Germany) 2009-10 Fulbright Fellow; Ruprecht-Karls-Universität Heidelberg. Guest Professor; ExtreMe Matter Institute, GSI Helmholzzentrum für Schwerionforschung (Germany) 2014 Visiting Angel Dacal Alonso Cathedra Professor; Universidad Nacional Autónoma de México (Mexico) 2015- Emeritus Professor of physics; Missouri University of Science and Technology; (Rolla, MO)