1. Adolphe Merkle InstituteUniversity of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
2. Department of High Energy DensityHelmholtz‐Zentrum Dresden‐Rossendorf Bautzner Landstraße 400 01328 Dresden Germany
3. Department of ChemistryUniversity of Fribourg Chemin du Musée 9 1700 Fribourg Switzerland