V Porkhanov and I Polyakov designed the experiments. E Gashimova, A Osipova, A Temerdashev, D Perunov and E Dmitrieva performed the experiments. E Gashimova, A Temerdashev and D Perunov analyzed and interpreted the results. E Gashimova, A Osipova and E Dmitrieva wrote the paper. All authors reviewed the manuscript.