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A survey of parity-changing E1 transitions has been pursued in N տ Z nuclei near 56 Ni using data from an EUROBALL experiment. Linear polarization measurements have been combined with angular correlations of coincident ␥ rays to determine the electromagnetic character of numerous transitions. The impact of the results on shell-model parametrizations is briefly discussed.

The individual lifetimes of three low-lying states in the proton-decaying well-deformed rotational band in the second minimum of the NϭZ nucleus 58 Cu were determined. Doppler-shift attenuated ␥-ray lineshapes were analyzed following the fusion-evaporation reaction 40 Ca( 24 Mg,1␣1p1n) 58 Cu and using the EUROBALL ␥-ray spectrometer coupled to ancillary detector systems. The deduced transitional quadrupole moments confirm the predicted increase of deformation towards the bottom of the band. The ␥ decay-out strength hints towards a nonstatistical pattern.

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In this paper the synthesis and study of the structural, morphological, electrical, magnetic and electronic properties of the LaBiFe 2 O 6 novel material are reported. The material was produced using the standard ceramic method. The Rietveld analysis of experimental data of x-ray diffraction showed that it synthesizes in an orthorhombic perovskite structure (Pnma, #62 space group). Two types of grain, micro and submicrometric, with the LaBiFe 2 O 6 stoichiometry were identified by scanning electron microscopy and Xray dispersive spectroscopy. Results of electrical polarization and dielectric constant ferroelectric suggest the occurrence of response of the material at room temperature. A T=300 K the material is ferromagnetic and exhibits an anomaly at T=258 K, which is attributed to anisotropy effects, suggesting the occurrence of biferroic behaviour. Results of diffuse reflectance suggest a semiconductor behaviour with energy gap E g =2,17 eV, which is in agreement with calculations of band structure and density of states for one spin orientation, while for the other spin configuration calculations suggest a conductor feature.