File talk:Pn scatter pi0.png

I'm sorry, but I don't understand this diagram. From it, the separation between the neutron and the proton increases after the exchange of the pion as if the nuclear force were repulsive. But isn't it an attractive force, since it is what bound nucleons together? Sorry for this elementary question. --187.37.10.36 (talk) 20:23, 19 October 2009 (UTC)