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  • 21.10.Tg  (2)
  • 23.20.En  (1)
  • 23.20.−g  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Electromagnetic decay strengths in the isobars89Nb,89Mo and89Tc (1995)
    Springer
    The European physical journal 352 (1995), S. 365-372 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Tg ; 21.60.Cs ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Lifetimes of high spin states in the threeA=89 isobars89Nb,89Mo and89Tc have been measured via the Recoil Distance Doppler Shift technique and the fusion evaporation reactions58Ni(35Cl,xnypzα) at 120 MeV beam energy. Reduced transition probabilities for about 50γ transitions were extracted. The experimental branching ratios in89Mo and reduced transition probabilities in all three isobars are compared with the predictions of the spherical shell model based on the restrictedπ(p 1/2),π(g 9/2), ν(p1/2),ν(g 9/2) configuration space with two different types of residual interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01299754
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    TheN=47 shell model nucleus90Tc (1994)
    Springer
    The European physical journal 349 (1994), S. 105-113 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Tg ; 21.60.Cs ; 23.20.Js ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Lifetimes of high spin states in the nucleus90Tc have been measured via the fusion evaporation reactions58Ni(36Ar,3pn)90Tc at 140 MeV and58Ni(35Cl,2pn)90Tc at 120 MeV beam energy. The OSIRIS spectrometer as well as a new neutron-γ-coincidence setup were used to measure lifetimes in the 10−12-10−9 s range by the recoil distance Doppler-shift method. By means ofγ-multiplicity and neutron-gated spectra fifteen lifetimes wered-educed. The experimental branching ratios and transition probabilities are compared to predictions of shell model calculations in a restricted π(p1/2), π(g9/2), ν(p1/2), and ν(g9/2) configuration space. In most cases the agreement with the calculations using the Gross-Frenkel parameters is striking but the results for several yrare states very sensitively depend on the residual interaction used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291167
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Anomalous behaviour of transition probabilities in75Kr (1990)
    Springer
    The European physical journal 336 (1990), S. 391-402 
    Details
    ISSN: 1434-601X
    Keywords: 27.50.+e ; 23.20.En ; 23.20.Gq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two collective bands of75Kr have been extended up to spin 21/2 using the compound reactions64Zn(14N,p2n)75Kr and50Cr(28Si, 2pn)75Kr. Spins and parities were assigned from neutron-gatedγ-ray angular distributions and excitation functions using the OSIRIS anti-Compton spectrometer. The bands are interpreted to be built on the well-deformed Nilsson states: [442] 5/2 and [301] 3/2. Energies for both bands and the order of magnitude of the mixing ratios in thef 5/2 band can be reproduced within the single-particle-plus-rotor model, while the experimentalQ(I→I−1)/Q(I→I−2) ratios, deduced from mixing ratios and branching ratios, exhibit large deviations by a factor 4 to 6 from theoretical values (which are around one). An explanation of this effect may be found by treating the two rotational bands each as a result of mixing between rotational bands of oblate and prolate states; thus explaining the large difference between B(E2,I→I−1) andB(E2, I →I−2) in the bands of75Kr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294113
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Decay of three-particle high spin states in85Y (1985)
    Springer
    The European physical journal 321 (1985), S. 659-669 
    Details
    ISSN: 1434-601X
    Keywords: 27.50.+e ; 23.20.−g ; 21.60.−n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High spin states in85Y have been excited in the reaction72Ge(16O,p2n) at 48–60 MeV beam energy. From measurements ofnγ andγγ coincidences, excitation functions and angular distributions, the high spin spectrum of85Y has been established up to 5.4 MeV excitation energy and spinI≦29/2. Lifetimes or limits of lifetimes have been determined for 14 levels via the recoil distance and Doppler shift attenuation method. Theg 9/2 decoupled proton band is found to backbend atI π=17/2+ as also seen in the reduction of the 17/2+→13/2+ and 21/2+→17/2+ E2 transition strengths. The lowest (3qp) positive parity band has predominantly aν 2 g 9/2×πg 9/2 structure. The observed negative parity yrast states in the spin range 15/2−≦I≦29/2− are most probably of (g 9/2)2 ×(f 5/2,p 1/2) (3qp) nature as suggested by a comparison of the84Sr and85Y level structures and electromagnetic transition strengths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01432443
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    Paper (German National Licenses)
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