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Investigation of Delta medium effects using the He-4(gamma,pi+ n) reaction

C. Y. Powrie, P. Grabmayr, J. Ahrens, 2002 .

C(,pn) photon asymmetry for Eγ=180–340 MeV

C. Y. Powrie, J. Ryckebusch, P. Grabmayr, 1999 .