STRUCTURE OF GA-66 FROM (P, N-GAMMA) REACTION

Gamma-ray, gammagamma-coincidence, and internal conversion electron sp ectra were measured with Ge(HP), as well as superconducting and tradit ional magnetic lens plus Si(Li) electron spectrometers at different bo mbarding proton energies between 6.5 and 7.1 MeV. Energies and relativ e intensities of 131 (among them 52 new) Ga-66 gamma-rays have been de termined. Internal conversion coefficients of 33 transitions were meas ured for the first time. A more complete level scheme with new levels, gamma-ray branching ratios, level spin and parity values has been ded uced. The energy spectrum and electromagnetic properties were calculat ed on the basis of an interacting boson-fermion-fermion/truncated quad rupole phonon model for odd-odd nuclei. The model calculations reasona bly describe the level spectra and electromagnetic properties of Zn-64 , Ga-65, Zn-65 and Ga-66 nuclei with consistent parametrization.