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  • 1975-1979  (6)
  • 1960-1964  (5)
  • 1955-1959  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Das Gammaspektrum des34Se81 (1959)
    Springer
    The European physical journal 157 (1959), S. 106-111 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decay of Se81 (18 min) produced by neutron bombardement of natural Se and 98% enriched Se81 has been studied with the aid of scintillation-spectrometers. Gamma-rays have been observed and could be identified as belonging to the decay of Se81, revealing three excited levels in Br31 at (282±3) keV, (565±6) keV and (820±10) keV. The branching ratios of the beta-components are 98,7% leading to the ground state and (0,06±0,03)%, (0,85±0,20)% and (0,40±0,10)% leading to the excited states, respectively. The 565 keV-level decays to the ground state directly or by a cascade-transition with nearly equal intensities, the 820 keV-level mainly by a direct transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01375154
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  • 2
    Electronic Resource
    Electronic Resource
    The internal conversion of theN=81 Isotones139m Ce and141m Nd (1978)
    Springer
    The European physical journal 284 (1978), S. 157-160 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A rapid gas-jet system was used for preparation ofβ −-samples of139m Ce and141m Nd. Conversion electrons and photons were detected simultaneously with absolutely calibrated detectors. Conversion coefficientsα K = 0.0732±0.0023 andα K=0.0824±0.0029, conversion ratiosK/L+...= 4.68±0.20 andK/L+...=4.58±0.23 were measured for139m Ce, and141m Nd, respectively. The calculated M4 values of Hager and Seltzer, and Dragoun et al. were confirmed within the experimental accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411322
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  • 3
    Electronic Resource
    Electronic Resource
    Spin of207mPo(2.79s); conversion measurement in207gPo decay (1978)
    Springer
    The European physical journal 286 (1978), S. 301-305 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In207m Po decay, the conversion of cascadingγ-rays 268 keV, 300 keV, and 814 keV was measured yielding the multipolarity to beE3.M2, andE2, respectively. Thereby, the spin of the isomeric state at 1382.95±0.14 keV was measured to be 19/2−. In207g Po decay, conversion electron andγ-ray intensities were remeasured in order to check earlier experimental inconsistencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408261
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  • 4
    Electronic Resource
    Electronic Resource
    Radiative capture of deuterons in Ba and Au (1979)
    Springer
    The European physical journal 291 (1979), S. 377-381 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 138Ba(d,γ)140La and197Au(d,γ)199mHg cross sections were measured for deuteron energies ranging from 5 to 26 MeV. A survey of existing experimental (p,γ), (d,γ) and (α,γ) cross sections is given. A comparison of all the experimental data with calculated compound nucleus cross sections is performed. An increase in the ratio of experimental cross sections and calculated compound nuclear cross sections with increasing mass numberA is observed for all capture processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408388
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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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  • 6
    Electronic Resource
    Electronic Resource
    New isomeric state in76Br with half-life 1.49 sec (1978)
    Springer
    The European physical journal 289 (1978), S. 121-122 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the course of systematic investigation of low-lying nuclear states in the region around the spacing at N=40 in the simple shell model a new isomeric state in76Br at 102.59±0.03 keV has been found having a half-life of 1.49±0.02 sec and spin 4+.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408504
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Isomerie des72Hf179 (1959)
    Springer
    The European physical journal 154 (1959), S. 408-418 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Dasγ- und das Konversionselektronenspektrum des 19 sec-Hf-Isomers wurden mit Szintillationsspektrometern in 47π-Geometrie gemessen. Dabei wurde die Halbwertszeit neu bestimmt zuT 1/2= (18,6+-0,2) sec. Aus den gemessenen Spektren konnten neben den Energien die Konversionskoeffizienten für beide Übergänge ermittelt werden. Für den ersten 161 keV-Übergang wurden ein Gesamtkonversionskoeffizientα 161= 35+-2 und ein K-Konversionskoeffizient α K,161=19,4+-1,2 gefunden, die gut mit den für einenM 3-Übergang berechneten Faktoren übereinstimmen. Die Messungen ergaben für die Energie des zweiten Übergangs E2= (217±2) keV und für den Gesamtkonversionskoeffizienten α217=0,055+-0,010. Im Gegensatz zur bisherigen Vermutung folgt daraus eindeutig, daß es sich bei diesem Übergang um E1-Strahlung handelt. Spin und Parität des Grundzustands und der angeregten Zustände des Hf179 sind damit im Einklang mit der vonNilsson angegebenen Niveaufolge für deformierte Kerne.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01328961
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  • 8
    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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  • 9
    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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  • 10
    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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