Mean field effects on the scattered atoms in condensate collisions P. Deuar, P. Ziń, J. Chwedeńczuk and M. Trippenbach Eur. Phys. J. D, 65 1-2 (2011) 19-24 Published online: 28 June 2011 DOI: 10.1140/epjd/e2011-20066-7