Polish Academy of Sciences, Institute of High Pressure Physics (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland Instytut Wysokich Ciśnień PAN (IWC), Sokołowska 29/37, Warszawa 01-142, Poland
Submitted: 2014-09-30 20:00 Revised: 2014-09-30 20:00