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  • 1
    Electronic Resource
    Electronic Resource
    Investigations of the level scheme of 144Gd and lifetimes in the quadrupole bands (2004)
    Springer
    The European physical journal 21 (2004), S. 37-55 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. For a level scheme investigation of 144Gd an experiment with the $\gamma$ -spectrometer EUROBALL III has been carried out and lifetimes have been measured with the $\gamma$ -spectrometer GASP using the Doppler-shift attenuation method. The high-spin states have been populated in these experiments by means of the 100Mo(48Ti,4n) reaction at 215 MeV and the 114Cd(36S,6n) reaction at E = 182 MeV, respectively. The known quadrupole band has been modified and a new one has been established. Reduced E2 transition probabilities B(E2) were determined for seven members of these quadrupole bands. They show values between $\approx 60$ and 130 W.u. and this considerable enhancement gives evidence for a significant nuclear deformation. A $(\pi h_{11/2})^2 \otimes (\nu h_{11/2})^{-2}$ configuration may be assigned to one of the quadrupole bands according to total Routhian surface calculations. The spin dependence of the B(E2) values has been explained by IBM calculations involving high-spin quasiparticle excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/i2003-10181-4
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  • 2
    Electronic Resource
    Electronic Resource
    Pair Correlations and Magnetic Susceptibility of Small Al-Grains (1999)
    Springer
    Journal of cluster science 10 (1999), S. 195-220 
    Details
    ISSN: 1572-8862
    Keywords: Magnetic susceptibility ; pair correlations ; aluminum clusters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Pair correlations and the magnetic susceptibility of electrons in a spherical cavity are studied both for grand canonical and the canonical ensemble. The coupling constant of the BCS Hamiltonian is adjusted to experimental values of the gap parameter. The gap parameter is found to increase for small grains as a consequence of the pronounced shell structure in the spectrum of the spherical cavity. The sharp phase transition at Tc is smeared out for the canonical ensemble. The strong paramagnetic susceptibility of the normal electrons in the cavity is reduced by the superconductivity, but it remains positive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022617104452
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    Paper (German National Licenses)
    Fulltext
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