Resonances in elastic alpha-particle scattering as evidence of clustering at high excitation in 34 S and 40 Ca

V.Z. Goldberg, M. Norrby, T. Lönnroth, G.V. Rogachev, M.S. Golovkov, K.-M. Källman, S.V. Perov, M. Lattuada, S. Romano, B.B. Skorodumov, G.P. Tiourin, W.H. Trzaska, and A. Tumino 1 Department of Physics, Åbo Akademi, FIN-20500 Turku, Finland 2 Department of Physics, Florida State University, Tallahassee, Florida 3 Joint Institute for Nuclear Research, Dubna, Russia 4 Istituto Nazionale di Fisica Nucleare Laboratori Nazionali del Sud, Catania, Italy 5 Dipartimento di Fisica ed Astronomia, Universit`a di Catania, Catania, Italy Department of Physics, University of Jyvaskyla, Jyvaskyla, Finland