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  • 1970-1974  (6)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Die Anregungszustände des79Br (1970)
    Springer
    The European physical journal 230 (1970), S. 371-382 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Previous investigations of nuclear resonance fluorescence from79Br have been improved by using a Ge-detector. In addition, energies and intensities of theγ transitions initiated by the decay of79Kr have been remeasured. Coincidences between theγ transitions were investigated using two 40 ccm Ge-detectors. 14γ transitions unknown up to the present have been identified. A level scheme having 12 excited states is proposed. Unique assignments of spin and parity to the 7 lowest states became possible by the present and former experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01403125
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ion molecule collisions investigated via nuclear resonance fluorescence (1973)
    Springer
    The European physical journal 263 (1973), S. 49-58 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The method of nuclear resonance fluorescence has been applied to analyse the profileN(E) of the 285 keV gamma line of75As after electron capture decay of75Se in gaseous75SeH2 sources. The profileN(E) depends on the velocity distribution of the radioactive As ions at the moment of γ-decay and, hence, is strongly dependent on the slowing down mechanism. Investigating sources with pressures of 1.5, 15, and 177 Torr different states of the slowing down process could be studied. A simple model is developed that describes the basic properties of the experimental line profiles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02351861
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Coulomb fragmentation in InI and InI3 (1971)
    Springer
    The European physical journal 246 (1971), S. 396-406 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fragmentation of InI and InI3 initiated by electron capture in In114 itm was studied by investigating the profile of the 558 keV γ line emitted by the Cd114 nuclei. The profile was deduced from measured cross sections for the resonant scattering of the 558 keV quanta in coincidence with the preceding 724 keV quanta. Predictions using a simple model for the fragmentation are in agreement with the experimental results for InI. The average energy of the fragments amounts to about 120 eV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02115804
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    γγ-Richtungskorrelationsmessungen am79Br (1973)
    Springer
    The European physical journal 260 (1973), S. 81-86 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using gaseous and solid sources of79Kr the γγ directional correlations of the 208.6–397.6 keV-, 299.6–306.6 keV- and 389.1-217.1 keV γγ cascades of79Br were measured. The results allow the unambiguous assignment of spin and parity to the levels at 397.6 keV (1/2−) and 306.6 keV (1/2−). In addition, they confirm the assignment to the level at 217.1 keV (5/2−).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398073
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Compton scattering of gamma rays by electrons bound in heavy atoms (1971)
    Springer
    The European physical journal 242 (1971), S. 444-457 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The energy spectra of 661.6 keV gamma rays scattered incoherently by lead have been measured for the scattering angles 62 °, 85 °, and 135 ° using a germanium detector. The differential cross sectionsdσdΩd E y′ obtained from the experiment have been compared with formfactor calculations using relativistics-electron wave-functions for the initial state and relativistic Coulomb wave-functions for the unbound state. A good agreement has been obtained for large energiesE y′ of the scattered quanta.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394682
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The perturbation of a γγ directional correlation of75As in gaseous H2 75Se sources (1972)
    Springer
    The European physical journal 256 (1972), S. 441-447 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using gaseous H2 75Se sources the γγ directional correlation of the 121.0–279.5 keV γγ cascade of75As was measured as a function of pressure. The attenuation coefficientG 2 varied between 0.67 and 0.96 for pressures between 0.1 and 200 Torr. Since the perturbation of the directional correlation is caused by hyperfine interaction of the highly charged ion formed after electron capture, the pressure dependence may be understood as being mainly due to changes of the charge states during collisions with neutral molecules. A simple model is proposed yielding a reasonable fit to the experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386989
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    Paper (German National Licenses)
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