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Atar, L. Pellegri, L. Stuhl, M.A. Najafi, M. Csatl\\'os, M. Fonseca, M. Heil, M. Heine, M. Holl, M.N. Harakeh, M. Pohl, M. Weigand, N. Blasi, N. Kalantar-Nayestanaki, N. Paar, O. Wieland, P. Diaz Fern\\'andez, P. Schrock, R. Plag, R. Reifarth, S. Altstadt, S. Bagchi, S. Brambilla, S. Kr\\\"ackmann, S. Riboldi, S. Schmidt, T. Aumann, T. Heftrich, U. Garg, V. Volkov, Yu.A. Litvinov","submitted_at":"2012-05-10T17:55:49Z","abstract_excerpt":"The gamma-decay of the anti-analog of the giant dipole resonance (AGDR) has been measured to the isobaric analog state excited in the p(124Sn,n) reaction at a beam energy of 600 MeV/nucleon. The energy of the transition was also calculated with state-of-the-art self-consistent random-phase approximation (RPA) and turned out to be very sensitive to the neutron-skin thickness (\\DeltaR_(pn)). By comparing the theoretical results with the measured one, the \\DeltaR_(pn) value for 124Sn was deduced to be 0.175 \\pm 0.048 fm, which agrees well with the previous results. 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