Research associate University Heidelberg, 1961-1962. Research fellow California Institute of Technology, Pasadena, 1962-1964. Guest scientist Niels-Bohr Institute, Copenhagen, 1964-1966.
Professor theoretical physics Free University Berlin and Hahn-Meitner Institute, Berlin, since 1966. Professor emeritus, 2002. Chairman science board, director Hahn-Meitner Institute Berlin, 1971-1973.
Visiting scholar Stanford University and Socially Responsible Investment International, 1976-1977, 84-85. Visiting professor Lawrence Berkeley Laboratory, Berkeley, California, Harvard Smithsonian Astrophysical, Cambridge, Massachusetts, University Heidelberg, Kyoto, Hiroshima, Japan, Tsukuba (Japan) University, Observatory, others. Chairman science-technical board Hahn-Meitner Institute, Berlin, 1994-1998.
Vikram A. Sarabhai professorship Physical Research Laboratory, Ahmedabad, India, 1996. Visiting foreign professor University Tsukuba, Japan, 2000, University Tokyo and Institute of Physical and Chemical Research, Japan, 2004.
- Lectures on Ion-Atom Collisions: From Nonrelativistic to Relativistic Velocities (North-Holland Personal Library)
- Atomic collisions offer some unique opportunities to study atomic structure and reaction mechanisms in experiment and theory, especially for projectiles of high atomic number provided by modern accelerators.
- Relativistic Atomic Collisions
- Relativistic Atomic Collisions is the first comprehensive treatise of relativistic atomic collision physics.
1961 - 1962
1962 - 1964
1964 - 1966