1. High Pressure Science and Engineering Center (HiPSEC), Department of Physics, University of Nevada Las Vegas (UNLV) Las Vegas NV 89154-4002 USA
2. Canadian Light Source, Department of Physics, University of Saskatchewan Saskatoon Saskatchewan Canada
3. European Laboratory for Non Linear Spectroscopy (LENS) Sesto Fiorentino 50019 Italy
4. Faculty of Chemistry, Adam Mickiewicz University Umultowska 89b, 61-614 Poznan�� Poland