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  • 21.10.R  (1)
  • 23.20.Gq  (1)
  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Heavy-ion in-beam studies of the nucleus87Nb (1991)
    Springer
    The European physical journal 340 (1991), S. 125-139 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.R ; 23.20.ck ; 27.50. + e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High spin states in the transitional nucleus87Nb up to 14 MeV excitation have been established for the first time via the reactions40Ca(50Cr, 3p)87Nb and58Ni (32S, 3p)87Nb. The87Nbγ-radiations have been identified throughγ-ray spectra taken in coincidence with the evaporation residues detected in the Daresbury recoil separator or with multiple proton emission. Gamma-gamma coincidences, DCO ratios,γ-ray angular distributions and lifetimes have been measured. A total of some 100 transitions have been placed into a level scheme comprising of sixty states. The one-quasiparticle (1qp) bands of either parity and several other band-like structures have been identified, some containing alignedg 9/2 nucleons. Moderately enhancedE2 in-band transitions of 13–48 W.u. as well as several weakE2 yrast transitions connecting bands with different quasiparticle numbers have been found. Similarities with respect to theN=46 isotones83Rb,84Sr,85Y,86Zr and88Mo are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303824
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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