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A cylindrical cell containing GaInSn alloy and aqueous solution of KOH, a highly simplified aluminium reduction cell, is constructed. A direct current is applied to the cylindrical cell to generate the magnetic field. In a range of amplitude and frequency of vertical vibration, a stable, non-axisymmetric wave pattern is produced, and the displacement of the oscillating interface is measured by a digital camcorder. The perturbation of the magnetic field caused by the non-axisymmetric interface is measured by fluxgate sensors and processed by fast Fourier transforms. The measurements are consistent with forward calculations, and have been exploited to reconstruct the deformed interface by solving an inverse problem so as to develop magnetic field tomography to reconstruct an unknown interface between two electrically conducting fluids.

Two regular dipole y-ray cascades have been observed in '"Pb. A comprehensive level scheme related to these structures has been built and first members oi rotational bands built on K = 8 and K = 11 two-proton oblate states have been identified. From the excitation energies, spin values, behaviours of the moments of inertia and alignments. and from the comparison with the isotone '"Hg, multiparticle configurations a n be attributed to three high-spin structures of '"Pb built respectively on the 4966 keV, 4334 keV and 6198 keV levels: