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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)
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  • 2
    Electronic Resource
    Electronic Resource
    Electronic rearrangement on molecules accompanyingβ-decay investigated by nuclear resonance fluorescence (1983)
    Springer
    The European physical journal 311 (1983), S. 253-257 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using gaseous60CoI2 sources, the velocity distribution of60Ni nuclei afterβ-decay of60Co has been measured by the nuclear-resonance-fluorescence coincidence (NRFC) method. By comparison with model calculations, information is obtained on the rearrangement of electrons on the molecule as a consequence of the change of nuclear charge. In 42% of the rearrangement processes bound (NiI2)+ or (NiI)+ molecule ions are formed. In 24% the molecule is singly charged but with the bonds between Ni and its molecular partners ruptured. In 34% the charging of more than one molecular partner leads to Coulomb explosion of the molecule. The probability of finding more than one charge on the molecule is larger by a factor of 2 as compared to the probability for electron shake-off on an isolated Ni atom.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415678
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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