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  • 1970-1974  (5)
Datenquelle
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Experimental study of high spin states in the ground state bands of158,160Er,164,166Yb, and168Hf (1972)
    Springer
    The European physical journal 257 (1972), S. 147-176 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Ground state rotational bands in the deformed doubly-even rare earth nuclei158,160Er,164,166Yb, and168Hf have been observed in (α, 8n γ) reactions. The γ-spectra associated with these reactions were studied in-beam using conventional spectroscopic methods. In all five nuclei the nuclear moment of inertia of the ground state rotational states was found to increase abruptly as higher spin states were attained. In a plot of the moment of inertia as a function of the angular velocity all these five nuclei display “backbending” curves. Moreover, in158Er and166Yb, the curves after passing through a maximum bend subsequently downwards.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01403545
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  • 2
    Digitale Medien
    Digitale Medien
    Electron capture decay of 51 min191Hg (1971)
    Springer
    The European physical journal 247 (1971), S. 383-399 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The decay191Hg→191Au was investigated by measuring γ-ray spectra, conversion electron spectra, and coincidence spectra, as well as lifetimes in the second region. The parent isotope191Hg was produced by the reaction197Au (d, 8n) withE d =80 MeV. About 80 γ-transitions of this decay were observed. Multipolarities of the more intense transitions were determined. An isomeric state of 0.92±0.11 s half-life was found in191Au. A level scheme for191Au is suggested. The measured γ-transitions are attributed to the decay of a 13/2+ isomeric state of191Hg; its half-life was found to be 50.8 ±1.5 min. The core excitation model was used to discuss some features of the level structure in191Au.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01395338
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Level crossing in hyperfine interactions studied by perturbed γ-γ angular correlations (1970)
    Springer
    The European physical journal 237 (1970), S. 137-154 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The technique of differential γ-γ angular correlation measurements has been applied to an investigation of the hyperfine interactions in the 482 keV level of181Ta. The activity was embedded in the lattice of a hafnium single crystal. The investigation of the quadrupole interaction gave for the electric interaction frequencyω 0=(313±4) MHz. The electric field gradient was found to be axially symmetric, the asymmetry parameter beingη〈0.1. Furthermore the combined collinear magnetic dipole and electric quadrupole interaction was studied. The angular correlation was investigated as a function of the strength of the external magnetic field by integral as well as time differential measurements. The integral anisotropy as function of the magnetic field has the shape of a resonance curve. The maximum was observed at a magnetic field ofB res=(24.2±0.5)kG.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01404474
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  • 4
    Digitale Medien
    Digitale Medien
    High spin states in the transitional nucleus156Er (1973)
    Springer
    The European physical journal 263 (1973), S. 201-210 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract High-spin states in156Er have been populated using the (α, 8n) and (16O, 4n) reactions. In the ground state band a strong backbending effect was observed atI π=12+. Four states of a secondK=0 band with spins 9, 11, 13 and 15 were found. This second band depopulates completely into the 8+ and 10+ members of the ground state band. This is explained by the fact that the upper states of this second band are yrast states and that this band crosses the (gsb)-line atI ≃11.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01392562
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  • 5
    Digitale Medien
    Digitale Medien
    Observation of back- and forwardbending in the182Os ground-state band (1973)
    Springer
    The European physical journal 264 (1973), S. 235-240 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract From a study of theγ-decay of high-spin states populated using the (α, 8n) reaction, the ground-state rotational band in182Os has been established up to spin 20+. A plot of the moment of inertia as a function of the square of the rotational frequency for this ground-state band results in a back-and-forwardbending curve, indicating that an explanation in terms of pure Coriolis decoupling in thei 13/2 neutron orbital requires revision. The moment of inertia reaches a maximum of only 74% of the rigid rotor value.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01396279
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