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  • 1975-1979  (4)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 282 (1977), S. 303-314 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decay of149Pr (T 1/2=2.2 min) has been studied using the two fission product separators JOSEF and LOHENGRIN to produce the149Pr nucleus. A level scheme for149Nd has been established. Theβ-branching and logft values for the excited levels were deduced from the analysis ofγ-intensity balances. Furthermore, the spins and parities for most of the excited states observed were obtained from the comparison between the present work, the neutron capture results and the pick-up reactions. The positive parity levels have been described with the Nilsson model with Coriolis andΔN=2 interactions included. The properties of the negative parity states cannot be explained as easily; however, it has been attempted to extract the structure of the ground state $$(I^\pi = \tfrac{5}{2}^ - )$$ and the first excited states $$(I^\pi = \tfrac{7}{2}^ - and\tfrac{3}{2}^ - )$$ .
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For the investigation of vibrational states in odd A nuclei we have studied the level structure of239U by the238U (n thermal,γ) reaction. Various complementary measurement techniques as curved-crystal-, anti-Compton-,γ-γ coincidence- and conversion electron spectroscopy have been applied. The resulting data have been used to establish the deexcitation scheme of239U up to ∼1.3 MeV and to make spin assignments. Most of the levels are interpreted in terms of the Nilsson model. The data also indicate the presence of the Nilsson states ¦501↺¦ and ¦750¦. Three members of theΒ-vibrational band built on the ¦631↺¦ state and one member of theΒ-vibration built on the ¦622↑¦ ground state have been identified through transitions with strongE0 admixtures. The octupole vibrational state built on the ¦631↺¦ band is proposed at 815 keV.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The level structures of the doubly odd nuclei80Br and82Br have been studied by means of the thermal neutron capture reactions79Br(n, γ)80Br and81Br(n, γ)82Br. Captureγ-ray spectra from isotopically separated targets have been measured in the approximate energy intervals 30〈E γ(keV)〈1100 with three bent crystal spectrometers installed at the Grenoble high-flux reactor. Measurements with Ge(Li) detectors covered the energy range 0.1〈E(MeV)〈8. Gamma-gamma coincidences have been taken at the research reactor FRJ-2 (Dido) at the Kernforschungsanlage Jülich. The conversion-electron spectra of80Br and82Br from thermal neutron capture have been measured with the beta-spectrometer at the Grenoble high-flux reactor. Using all these data the level schemes of80Br and82Br are proposed up to 1.5 MeV. Spin assignments for the excited states below 800 keV are proposed. The level schemes are discussed in terms of shell model configurations and, as an alternative description, in terms of the Nilsson model.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 283 (1977), S. 43-49 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The beta decay of136Te has been investigated with the on-line mass separator LOHENGRIN from the Institute Laue-Langevin at Grenoble in conjunction with an air-jet collecting system. A level scheme of136I based on coïncidence measurements has been established. The measuredQ β value is 5100±150 keV.
    Type of Medium: Electronic Resource
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