1. Institut Laue–Langevin, 6 rue Jules Horowitz, 38042 Grenoble, France
2. Faculty of Mathematics and Physics, Charles University, 121 16 Praha 2, Czech Republic
3. European Spallation Source AB, Tunavägen 24, 221 00 Lund, Sweden
4. Nuclear Physics Institute AS CR, 25068 Rez near Prague, Czech Republic