| 18/2-1/3 - 2008 | NORDITA, Nordic Institute of Theoretical Physics, Sweden. |
| 16/1-19/1 - 2008 | Institute for Theoretical Astrophysics, University of Oslo, Norway. |
| 2/1-6/1 - 2008 | Vienna Astronomical Observatory, University of Vienna, Austria. |
| 4/2-7/2 - 2007 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 21-27/1 - 2007 | Department of physics and astrnomy, University of St. Andrews, UK. |
| 26/9-1/10 - 2006 | Max-Planck-Institut fur Astronomie, Heidelberg, Germany. |
| 6/4 - 2006 | Department of Astronomy, Stockholm Observatory, Sweden. |
| 27/2-3/3 - 2006 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 15-22/6 - 2005 | Swiss Spallation Neutron Source SINQ, Villigen, Schweiz. |
| 7-11/3 - 2005 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 22-26/8 - 2004 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 9-15/11 - 2003 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 3-5/4 - 2003 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 19-22/3 - 2003 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 16-19/7 - 2002 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 4-8/6 - 2002 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 15-18/10 - 2001 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 8-13/10 - 2001 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 3-14/9 - 2001 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 1/8-2000 - 1/8-2001 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 18-23/10 - 1999 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 22-27/3 - 1999 | Institute of Astronomy, University of Vienna. |
| 27/2-5/3 - 1999 | Department of Astronomy & Space Physics, Uppsala University, Sweden. |
| 17-19/2 - 1999 | Chosmochemistry, Max-Planck-Insitut of Chemistry (Otto-Hahn-Insitut), Mainz, Germany. |
| 17-19/2 - 1999 | Chosmochemistry, Max-Planck-Insitut of Chemistry (Otto-Hahn-Insitut), Mainz, Germany. |
| 21/6-8/7 - 1998 | Astrophysical institute & University Observatory, Friedrich Schiller University, Jena, Germany. |
| 4-7/5 - 1998 | Chosmochemistry, Max-Planck-Insitut of Chemistry (Otto-Hahn-Insitut), Mainz, Germany. |
| 13-23/7 - 1997 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 1/2-21/5 - 1997 | Astrophysical Institute & University Observatory, Frederich Schiller University, Germany. |
| 20-30/1 - 1997 | Chosmochemistry, Max-Planck-Insitut of Chemistry (Otto-Hahn-Insitut), Mainz, Germany. |
| 5-8/1-1997 | Chosmochemistry, Max-Planck-Insitut of Chemistry (Otto-Hahn-Insitut), Mainz, Germany. |