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  • Articles: DFG German National Licenses  (13)
  • Electronic Resource  (13)
  • 1960-1964  (13)
Source
  • Articles: DFG German National Licenses  (13)
Material
  • Electronic Resource  (13)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Der Zerfall des Gd151 (1963)
    Springer
    The European physical journal 175 (1963), S. 405-415 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electron-capture decay of Gd151 was investigated by means ofγ- andγ-γ-coincidence spectrometry, using scintillation counters. Besides the knownγ-rays of 22 kev, 154 kev, 175 kev, 244 kev and 308 kev additionalγ-transitions with energies of 107 kev and 350 kev could be assigned to the decay of Gd151.γ-γ-coincidence measurements showed the following cascade transitions: (107 kev–244 kev), (154 kev–175 kev–22 kev) and (308 kev–22 kev). TheK-conversion-coefficients of several transitions were determined by comparing theγ-intensities and the previously known conversion electron-intensities, using a direct measurement of theK-conversion-coefficient of the 175 kev-transition by a delayed coincidence-experiment as a normalization of the relative intensities. With the available information a level-scheme for Eu151 is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01375250
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Das Quadrupolmoment des 8,42 keV-Niveaus von Tm169 (1963)
    Springer
    The European physical journal 175 (1963), S. 416-421 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine interaction of the 8·42 kev level of Tm169 was investigated using the Mössbauereffect in Tm-ethylsulfate. The hyperfine-splitting is of pure quadrupoletype; its temperature dependance between 6°K and 250°K was measured. The spectroscopic quadrupolemoment of the 8·42 kev level was determined asQ=−(1·1±0·1) barn, leading to an intrinsic quadrupolmoment ofQ 0=+(5·5±0·5) barn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01375251
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Hyperfeinstrukturaufspaltung von rückstoßfreien Gammalinien (1962)
    Springer
    The European physical journal 170 (1962), S. 267-273 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature dependence of the hyperfine splitting of the 8.42 keVγ-ray of Tm169 in oxide crystals was investigated using the Mößbauer-effect. The quadrupole splitting of the first excited state in Tm169 showed a pronounced increase with decreasing temperature. This manifests a contribution of various Stark levels, which are occupied according to their Boltzmann factors, to an average field gradient at the nucleus. It is shown in a model calculation for the temperature dependence of the field gradient that the data can be explained using a maximum splitting of about 400 cm−1 of the electronic groundstate by the crystal field. The emission pattern of the Er2O3-source is broadened below 20° K. This is possibly produced by an interaction with a residual magnetic field from the surrounding Er-ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378467
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Zerfall des Cl38-Isomers (1962)
    Springer
    The European physical journal 170 (1962), S. 76-81 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cl38m was produced by neutron activation of chlorine containing samples in a pneumatic irradiation facility. The decay of the Cl38-isomer was investigated by various scintillation spectrometer technics. The half-life and the internal conversion coefficient α of the 0.66 MeV isomeric transition was found to beT 1/2=0.74±0.03 sec and α=(5.0±1.2)×10−4. These data suggest aM-3 transition between an isomeric state with the spinI=5− and the ground-state of Cl-38 (I=2−).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378310
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetisches Moment und Quadrupolmoment des 8,42 keV-Zustandes von Tm169 aus der Hyperfeinstrukturaufspaltung in Tm-Metall (1963)
    Springer
    The European physical journal 172 (1963), S. 231-238 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine transition from the 8·42 kev level to the groundstate of Tm169 was investigated using the Mössbauer-Effect in Tm-metal in the temperature range between 5° K and 60° K. Well resolved hyperfine spectra were found between 5° K and 25° K indicating an internal magnetic field of about 7×106 Oe and a large electric fieldgradient. The ratio of the magnetic moments of the 8·42 keV rotational state to the groundstateμ a /μ g =−2·33±0·04 was deduced from these measurements. The magnetic moment of the groundstate and the quadrupole moment of the 8·42 kev level were deduced from calculated internal fields. These data were analyzed in terms of the “Unified Nuclear Model” and the results compared with other known magnetic moments andM-1-transition probabilities in theK=1/2 rotational band of Tm169. The complicated hyperfine spectra obtained above 25° K reveal the influence of complex magnetic ordering on the internal fields in Tm-metal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01377743
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Bestimmung des magnetischen Moments des 206 keV-Niveaus von Re187 (1963)
    Springer
    The European physical journal 175 (1963), S. 520-529 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The half life of the 206 kev state of Re187 was determined with delayed coincidence technic to be:T 1/2=(5·70±0·05)·10−7 s. The rotation of the spin of the 206 kev state in a magnetic field has been observed in a differential angular correlation measurement with the 480 kev−72 kevγ−γ cascade. From the observed Larmor frequency a magnetic moment ofμ=(5·02±0·06)μ K for the 206 kev level has been derived. The 480 kev−72 kevγ−γ angular correlation was found to be undisturbed in an aqueous solution of ammoniumtungstate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01375344
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Hyperfeinstrukturaufspaltung von rückstoßfreien γ-Linien (1962)
    Springer
    The European physical journal 166 (1962), S. 1-5 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Mit Hilfe des Mößbauer-Effektes wurde Kernresonanzabsorption im 84 keV-Niveau von Yb170 nachgewiesen. Durch Messung der Resonanzabsorption als Funktion der Doppler-Verschiebung zwischen einer Tm170-Metallquelle und einem Yb2O3-Absorber bei 20° K wurde eine Hyperfeinstrukturaufspaltung des 84 keV-Niveaus beobachtet. Aus einer aufgelösten Resonanzlinie ergibt sich die Halbwertszeit des 84 keV-Niveaus zu (1,5±0,2)·10−9 sec. Die Aufspaltung kann durch eine Quadrupolwechselwirkung im Yb2O3 erklärt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378517
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Mößbauer-Effekt im normalleitenden und supraleitenden Zustand von Sn119 (1962)
    Springer
    The European physical journal 166 (1962), S. 109-114 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The number of Moessbauer quanta from the 23.8 keV state of Sn119 in a tin metal source was measured after attenuation by a 16.1 mg/cm2 absorber of tin metal, as a function of temperature above and below the transition point of superconductivity. Source and absorber were kept at the same temperature. The data give evidence of a discontinuous change at the transition temperature: The transmitted intensity is lowered by (1,3±0.15)·10−3 in the superconducting state of source and absorber. This corresponds to an increase of the Debye-Waller-factor by about 0,4%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378526
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Quadrupolaufspaltung und Isomerieverschiebung der 14,4 keV γ-Linie von Fe57 in metall-organischen Eisenverbindungen (1962)
    Springer
    The European physical journal 166 (1962), S. 220-226 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Mößbauer absorption of the 14.4 keVγ-ray of Fe57 was investigated in Ferrocene, Fe(C5H5)2, and in a Ferriciniumcation [Fe(C H5)2]BF4. The resonance absorption spectra reveal a quadrupole splitting and an isomeric shift of the 14.4 keV level in both compounds. The data give some evidence of the occupation of the molecular orbits formed in these complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01377953
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Hyperfeinstrukturaufspaltung von rückstoßfreien γ-Linien: II. Das 8,42 keV-Niveau in Tm169 (1961)
    Springer
    The European physical journal 163 (1961), S. 87-91 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wurde die rückstoßfreie Kernresonanzabsorption in dem 8,42 keV-Niveau von Tm169 beobachtet. Durch Messung der Resonanzabsorption als Funktion der Doppier-Verschiebung zwischen dem Emitter und Absorber wurde eine Hyperfeinstrukturaufspaltung der 8,42 keV-γ-Linie durch die Felder der paramagnetischen Ionen in den Oxydkristallen gefunden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01328919
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    Paper (German National Licenses)
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