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  • 1990-1994  (7)
  • 1970-1974  (5)
  • 1960-1964  (13)
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  • 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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  • 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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  • 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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  • 4
    Electronic Resource
    Electronic Resource
    Isomer shift and quadrupole splitting of the 2+-rotational state in174Yb (1971)
    Springer
    The European physical journal 241 (1971), S. 138-149 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The change of the charge radius and the quadrupole moment of the 2+-rotational state of174Yb are determined from Mössbauer measurements. Comparison with170Yb reveals slightly increasing rigidity at constant equilibrium deformation if two neutron pairs are added. Theoretical predictions are discussed, in connection with additional experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01397903
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  • 5
    Electronic Resource
    Electronic Resource
    Mössbauer studies and nuclear quadrupole moments of186, 188, 189, 190 Os (1972)
    Springer
    The European physical journal 254 (1972), S. 112-126 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer transmission experiments with the 137, 155, 69 and 187 keV gamma rays of186, 188, 189, 190Os, respectively, yielded the electric quadrupole splitting of these gamma resonance lines in OsO2 and OsP2. From the results the following ratios of quadrupole moments were derived:Q 2 +(186Os, 137 keV):Q 2 +(188Os, 155keV):Q 2 +(190Os, 187 keV):Q 3/2 −(189Os, g.s.)=(+1.100±0.020): 1.0:(+0.863±0.051): (−0.586±0.011) andQ 5/2 −(189Os, 69 keV)/Q 3/2 −(189Os, g.s.)=−0.735 ±0.012. The ratios for180, 188, 190Os are, within their limits of error, in agreement with the expectation of the rotational model, indicating that the pairing-plusquadrupole model calculations of Kumar and Baranger predict too rapid a transition form rotational to vibrational nuclei. Applying this argument to186Os in particular and using the measured ratios, one obtains a set of values for the quadrupole moments themselves, namelyQ 2 + (186Os)=−(1.50 ± 0.10)b,Q 2 +(188Os)=−(1.36± 0.09) b,Q 2 + (190Os)=−(1.18 ± 0.08) b,Q 3/2 −(189Os)=+ (0.80 ± 0.06) b, andQ 5/2 − (189Os)=− (0.59 ± 0.05) b. For the electric field gradient at Os nuclei in Re metal a value ofV zz=−(3.3 ± 0.6) · 1017 V/cm2 was found. A measurement with a magnetically split source yielded δ=+ 0.685 ± 0.025 for theE2/M1 mixing parameter of the 69 keV transition of189Os,g 5/2 −/g 3/2 −=0.895 ± 0.006 for the ratio of theg-factors of the 69 keV state and the groundstate, andH i=−(1135 ± 20) kOe for the hyperfine field at Os nuclei in an iron matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01380060
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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    Electric quadrupole and magnetic dipole moments of the first excited 2+ states of186Os and188Os (1970)
    Springer
    The European physical journal 230 (1970), S. 80-88 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spectroscopic quadrupole moments and the magnetic dipole moments of the lowest 2+ states in186Os (137 keV) and188Os (155 keV) have been determined by Mößbauer transmission experiments. The electric quadrupole momentsQ 2+(Os 186)=− (1.80±0.22) b andQ 2+(Os 188)=−(1.81±0.24) b as well as their ratioQ 2+(Os 188)/Q 2+(Os 186)=1.00±0.07 within the limits of error agree withB(E2) data, if a comparison on the basis of the rotational model is made. For the g-factors and their ratio g2+(Os 186)=0.281±0.008, g2+(Os 188)=0.305±0.015 andg 2+(Os 188)/g 2+(Os 186)=1.08±0.05 was obtained. All results are compared with recent model calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394583
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  • 8
    Electronic Resource
    Electronic Resource
    Nuclear orientation of183Re and184Re in iron (1972)
    Springer
    The European physical journal 254 (1972), S. 312-322 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature dependence of the anisotropy of γ-rays from the decay of oriented183,184Re nuclei situated in an iron matrix was measured between 14 and 33 mK. Magnetic hyperfine splitting constants ofgH HF=5.04(9) × 10−18 erg andgH HF=3.21 (13) × 10−18 erg were determined for the groundstates of183Re and184Re, respectively. With the previously known hyperfinefield of −760(15) kG for Re in iron the followingg-factors were deduced:183Reg=1.32 (5) and184Reg=0.84 (5). The E2/M1 mixing ratio of the 793 keV 2+ −2+ transition in184W was accurately determined to δ (793 keV)=+16.65 (85).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01390261
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  • 9
    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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  • 10
    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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