Affiliation: | 1.Department of Quantum Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, ul. Grudzia?dzka 5, 87-100, Toruń, Poland ;2.Atomic and Optical Physics Division, Department of Atomic, Molecular and Optical Physics, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, 80-233, Gdańsk, Poland ; |