1. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic
2. Department of Physical Chemistry, University of Chemistry and Technology in Prague, Technická 5, 166 28 Praha 6, Czech Republic
3. Department of Thermodynamics, Institute of Thermomechanics of the CAS, v. v. i. Dolejškova 1402/5 182 00 Prague 8 Czech Republic