Elastic and inelastic scattering of 22.3MeV polarized protons &om even-mass nuclides ' @' %e and ' -Se has been studied. The elastic data have been analysed by optical-model techniques; also the elastic and inelastic data together have been investigated using a coupled-channels formalism. In the latter case the original opticalmodel parameters had to be modified in order to obtain an adequate description of the elastic scattering process. The 2; and 3; states are described satisfactorily by the coupled channels formalism in a vibrational model. This model represents the 4 ' states better than expected, and the 2; and 4 : states only if the 2+ and 4" levels are treated as mixtures of one-phonon and two-phonon components. Alternatively, a rotational description of the ?.+, 2: and 4: states was moderately successful. Some features may be understood qualitatively from the interacting-boson approximation (IBA-?). NUCLEAR REACTIONS 7Qn.7r.'6Ge, 76,78%e (polarized p, p'), E = 22.3 MeV; measured v(@), A(@); deduced optical-model parameters. deformation, mixing of one-/two-phonon states; cc calculations, also IBA-2.
Measurements are reporled on polarized-proton scattering from the even-mass zinc isotopes at 20.4MeV beam energy. The elastic and first-order inelastic processes are represented well by standard theory. The analysis of the two-phonon multiplets presents difficulties which may indicate a change in the nuclear structure between isotopes or the occurrence of an energy-dependent interfering process.NUCLEAR REACTIONS 64,66.68,mZn (polarized p,p') E = 20.4MeV; measured o(e), A(0); deduced optical model parameters, deformation strengths for 2 : and 3; states. DWBA calculations;for -Zn and "Zn also cc.
The even-mass samarium isotopes 148-~'s2Sm have been investigated by polarizedproton scattering at 20.4 MeV beam energy. The data have been analysed with an 'extended' optical model, where the intensities of the first maxima of the main inelastic chamnels are fitted in a coupied-channels calculation. The availability of analysing-power dala fumed out to be very helpful in the analysis. The well known phase transition from vibiator 10 m o r shows up clearly with increasing neutron number.NUCLEAR REACTIONS 14~'50~152~154Sm (polarized p,p), E = 20.4 MeV: measured U(@, A W ) ; deduced optical-model parameters, deformation suenglhs. multipole moments.
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