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  • 1960-1964  (5)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Die Existenz zweier Neutrinoarten (1963)
    Springer
    Naturwissenschaften 50 (1963), S. 463-466 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00632910
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Die Faktoren der inneren Umwandlung beim35Br80m (4,4 Std) (1960)
    Springer
    The European physical journal 158 (1960), S. 242-250 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The intensities of the 37keV- and 49keV-γ-rays of Br80m have been measured with the aid of Na J-scintillation spectrometers and compared with the intensity of the conversion electrons registered by an anthracene split crystal spectrometer. It was possible to separate the 49 keV-γ-radiation from the intense 37 keV-line by selctive absorption with balanced Sm- and Gd-filters. The internal conversion coefficientsα(49 keV)=298±30 andα (37 keV)=1,59±0,10 are in good agreement with the calculated values for M3- and E1-transitions. The half life was measured yielding a value ofT 1/2=(4,40±0,05) h.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333037
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Die isomeren Atomkerne: Yb169m, Yb175m, Yb177m (1960)
    Springer
    The European physical journal 160 (1960), S. 201-212 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Short lived isomers of Yb were produced by neutron irradiation of enriched isotopes and have been investigated with the aid of scintillation spectrometers. Yb169m decays with a half-life ofT 1/2=(46±2) sec emitting only L-radiation. This decay is assumed to be the same as the E 3-transition of 24 keV following the electron capture of Lu169. Yb175m [T 1/2=(0,072±0,005) sec] emitsγ-rays of (495±15) keV. The measured K-conversion coefficientα K 495=0,24±0,04 and the total conversion coefficientα 4 5=0,6±0,3 indicate the transition to be M3. Yb177m [T 1/2=(6,4±0,1) sec] decays by a cascade of twoγ-rays. The isomeric (228±3) keV-transition is followed by a (104±1,5) keV-radiation. The measured conversion coefficients areα K 228=4,1±0,4 andα K 228=6,5±0,5 for the first transition andα K 104=0,39±0,05 andα 104=0,51±0,05 for the second, indicating a M3-E1-cascade. For the M 3-transition the measured coefficients agree well with those calculated for a nucleus of finite size, but they differ by a factor of 1,5 for the E1-transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01336982
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Der Zerfall des W183m (1961)
    Springer
    The European physical journal 162 (1961), S. 329-336 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung W183m was produced by the reaction W182 (n, γ)W183m. The half life has been remeasured yielding a value of (5sd1±0·2) sec. With the aid of scintillation spectrometers fourγ-lines could be detected: two lines at about 100 keV, one at (161±3) keV and one at (211±4) keV. A new technique was used to obtain the energy of the isomeric state. The total transition energy of this state was measured by summing up all possible cascade transitions ofγ-rays and conversion electrons with a source between two halves of a CsJ crystal. The results are compared with the level scheme of W183 as measured byMurray et al. in theβ-decay of Ta183. A decay scheme of W183m is presented with the isomeric state at (310±4) keV and three known lower energy levels of W183 at 207keV, 99 keV and 46 keV. The main branch of the isomeric decay leads to the 207 keV-level most probably by an M2 transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01341979
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  • 5
    Electronic Resource
    Electronic Resource
    Der Zerfall des Co60m und Zr90m (1963)
    Springer
    The European physical journal 174 (1963), S. 206-221 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Co60m was produced by the reaction Co59 (n,γ) Co60m ; its decay has been investigated by scintillation spectrometers. The half-period has been remeasured yielding a value ofT 1/2=(10·35 ±0·20) min. The isomeric decay mainly leads to the Co60 ground state by a (58·6±0·6) keV transition. TheK-conversion coefficientα K= 41±3 and the total conversion coefficientα=47±3 indicate the transition to beM3 and the spin of Co60m to be 2+. Further Co60m decays by beta transitions to Ni60. The beta component (8·6±1·2)·10−3%, log ft=7·32 leading to a (2·16±0·02) MeV level has been measured for the first time. A second component (0·24±0·03)%, log ft=7·23 leads to the 1·33 MeV level. The 2·16 MeV level decays to the Ni60 ground state mainly by a 0·83–1·33 MeV cascade, in a few cases by a direct transition. The spin of the 2·16 MeV level is 2+. Zr90m was produced by the reaction Zr90 (n,n′) Zr90m . The half-period was measured yielding a value ofT 1/2=(0·83±0·03) sec. Zr90m decays in the following way: (77±5) % by a direct (2·31±0·02) MeV —E 5 transition to the Zr ground state and (23±5)% by a (132·5±1·5) keV-(2·18±0·03) MeV cascade detected for the first time in the isomeric decay. TheK-conversion coefficient of the 132·5 keV transition isα k=(2·2±0·3) indicating this transition to beE3 and the spin of the 2·18 MeV level to be 2+. The Zr90m -decay sheme is in accordance with the level sequence of Zr90 as measured in the Nb90 decay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381653
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    Paper (German National Licenses)
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