Pion Emission in H-2,C-12,Al-27(gamma,pi+) Reactions at Threshold

Pavel Golubev, Vladimir Avdeichikov, Kevin Fissum, Bo Jakobsson, I A Pshenichnov, W J Briscoe, G V O O’Rielly, J Annand, Kurt Hansen, Lennart Isaksson, H Jäderström, Martin Karlsson, Magnus Lundin, Bent Schröder, L Westerberg