Elastic and inelastic scattering of 22 MeV protons from natural even-even Zn and Ge isotopes: (II). Spectroscopy of the 68,70Zn and comparison between structure of low-lying states of Zn and Ge

Abstract

The (p, p′) inelastic scattering on 68Zn and 70Zn has been measured at 22 MeV incident energy with an overall energy resolution of 14 keV for 68Zn and 24 keV for 70Zn using a tandem Van de Graaff and a split-pole magnetic spectrometer. Differential cross sections were obtained for levels up to 4.9 and 4.4 MeV excitation energy for 68Zn and 70Zn respectively. Experimental cross sections are compared with DWBA calculations, asymmetric rotor model, harmonic and anharmonic vibrational models coupled-channels calculations. Spin and parity assignments have been deduced for both isotopes. Results for 64Zn, 66Zn, 68Zn and 70Zn are discussed. Comparison between the deformation lengths deduced from these measurements and those derived from similar analysis using other projectiles, for the natural even-even Zn and Ge nuclei, are made; also, comparison between the structure of low-lying states of these nuclei are made.