Radiation pressure force on cold rubidium atoms due to excitation to a non-cooling hyperfine level Gordana Kregar, Neven Šantić, Damir Aumiler and Ticijana Ban Eur. Phys. J. D, 68 12 (2014) 360 Published online: 01 December 2014 DOI: 10.1140/epjd/e2014-50312-3