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[en] Level densities and radiative strength functions in 171Yb and 170Yb nuclei have been measured with the 171Yb(3He,3He(prime) γ)171Yb and 171Yb(3He, αγ)170Yb reactions. A simultaneous determination of the nuclear level density and the radiative strength function was made. The present data adds to and is consistent with previous results for several other rare earth nuclei. The method will be briefly reviewed and the result from the analysis will be presented. The radiative strength function for 171Yb is compared to previously published work.
[en] We present a complete set of data describing the nucleation both of superfluidity and phase separtion at container walls in liquid 3He--4He mixtures. The appearance of superfluidity and the growth of phase-separated films are measured locally at the walls. A theoretical interpretation is given, important results of which are that the phase separation and superfluid transitions become uncoupled when the transitions are localized near the walls and that quantum fluctuations most probably strongly affect the nature of the superfluid nucleation transition at low temperature. Further, comparison of our results with data for transitions in pure 4He films demonstrates that a universality principle governs the transitions in both systems
[en] The sequence of nuclear shapes from spherical to prolate or oblate to octupole involves a corresponding sequence of symmetry breakings. Each successive symmetry breaking leads to a more complex nuclear spectroscopy which displays the distinguishing features of that nuclear shape. The author discusses the particular spectroscopic features which signal the existence of octupole deformation (reflection asymmetry) and apply them to a number of odd-A and odd-odd nuclei in the actinide and rare earth regions