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AbstractA cross section enhancement, persisting to high momentum transfer, has been observed around l hto in excitation energy in spectra from inelastic proton-, alpha-and electron scattering on 9°Zr, ll6Sn, 196pt and 2°spb. Data are presented for (p,p') at 201 MeV, (a,a') at 120 MeV and analyzed together with existing data obtained with 133.8 MeV polarized (l~,p') on 116Sn and electron-scattering data on Ll6Sn and ~96pt. Two different interpretations of the observed enhancement are discussed: that of the incoherent sum of all 1 hto cross section and alternatively the sum over the isoscalar normal modes of all multipolarities.Keywords: NUCLEAR REACTIONS 9°Zr, ll6Sn, 196pt, 2°spb (p,pt), E = 201 MeV; ll6Sn (polarized p,p'), E = 133.8 MeV; 9°Zr, ll6Sn, 196pt (~t, ctt), E = 120 MeV; measured o-(0), ll6Sn, 196pt (e,e~), E = 278, 333 MeV; measured form factors. 9°Zr, ll6Sn, 196pt, 2°Spb deduced 0, lhto strength distribution. DWBA calculation and effective NN-foree. A. Hofstee et al./Nuclear Physics A 588 (1995)
