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  • 1985-1989  (5)
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Material
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    The slowing-down of low-energy recoil atoms in solids and liquids investigated by nuclear resonance fluorescence (1987)
    Springer
    The European physical journal 66 (1987), S. 147-151 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the nuclear resonance-fluorescence technique, the slowing down mechanisms of recoiling140Ce nuclei in La, LaMg3 and La2O3, are studied via the Dopler shift of the 1.596 MeV γ transition, following the β decay of140La. In LaMg3 the slowing down time shows a pronounced temperature dependence with a sharp drop close to the melting point. In the oxide, as well as in the metal with only a small oxygen content, the slowing down time is considerably smaller than in the pure metal. These results are in support of a model, describing the slowing down process in solids in terms of a damped oscillation, with a time dependence related to the phonon frequency spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01311649
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Half-life and α-ray energy of146Sm (1987)
    Springer
    The European physical journal 327 (1987), S. 171-174 
    Details
    ISSN: 1434-601X
    Keywords: 23.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Up-to-date α-decay data of the double-even,N=84 isotones are presented, including the presently remeasured values for146Sm. For this nuclide a half-life,T 1/2 =1.031 (45) ×108 y, and α-ray energy, Eα=2455(4) keV, were measured. The significance of these data for the subshell closure atZ=64 observed in α-decay is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292406
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ion-molecule collisions in gaseous111InCl and111InI systems (1986)
    Springer
    The European physical journal 325 (1986), S. 121-126 
    Details
    ISSN: 1434-601X
    Keywords: 23.20 ; 23.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using gaseous sources of111InCl and111InI with densities between 1.0·1017 cm−3 and 4.4·1019 cm−3 the perturbation of the 171.3–245.4 keVγ-γ cascade was measured as a function of time and density by the time-differential perturbed angular correlation (TDPAC) method. The anisotropy shows a strong dependence on the density. By means of an extended model based on a stochastic model of Bosch and Spehl collision cross sections for charge transfer and deorientation could be determined. The cross sections for charge transfer collisions were within the region from 2·10−15 cm2 to 26·10−15 cm2 and for deorientation collisions between 1·10−15 cm2 and 100·10−15 cm2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289642
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Hyperfine interaction of99Ru in dilute silver alloys (1987)
    Springer
    Hyperfine interactions 35 (1987), S. 635-638 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The perturbed angular correlation was measured for99Rh probe in dilute silver alloys with Cd, In, Sn and Sb impurities. The attractive interaction between99Rh and impurities was found and the binding energy of the probe-impurity pairs was determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02394466
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic hyperfine interaction after77Br implantation into iron (1988)
    Springer
    Hyperfine interactions 39 (1988), S. 81-91 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Radioactive77Br ions were implanted at 60 keV and 270 keV into polycrystalline iron foils. The magnetic hyperfine interaction of the daughter nucleus77Se in the 250 keV isomeric level was investigated using the perturbed angular correlation technique and fast BaF2 detectors. The Larmor frequency at room temperature was determined as ωL=1272(2) MHz, leading to a substitutional hyperfine field ofB hf(SeFe)=62(6) T. The substitutional fraction rises from 21% at room temperature to about 100% at 790 K annealing temperature. No other well-defined magnetic or electric hyperfine component attributable to impurity-defect complexes was identified. The diffusion of Br atoms in the surface region during the annealing process was studied via Rutherford backscattering with 1.0 MeV α-particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02394648
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    Paper (German National Licenses)
    Fulltext
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