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  • 1
    Electronic Resource
    Electronic Resource
    Structure of theN=59 nucleus97Sr: coexistence of spherical and deformed states (1990)
    Springer
    The European physical journal 337 (1990), S. 149-159 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 21.60.Ev ; 23.20.−g
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A band with a rotational pattern based on a state at 585.1 keV has been identified in theN=59 neutron-rich nucleus97Sr. Its properties lead to the [422] 3/2 Nilsson-orbital assignment for the band head. There is evidence for a second band with the head at 644.7 keV and the configuration [541] 3/2. Since the ground state and the lowest excited levels are spherical, shape coexistence is established for97Sr. A deformed nature of several levels at 500–600 keV results also from QRPA-model calculations. The structure of the low-lying spherical levels has been studied in the frame of the IBF model. The results of the present investigations lead to a better understanding of theN=59 isotones which constitute the link between the spherical and deformed nuclei atA∼100 as a species with shape coexistence but without any indications of particular softness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294286
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  • 2
    Electronic Resource
    Electronic Resource
    A new high-spin isomer in 39 97 Y58 (1986)
    Springer
    The European physical journal 323 (1986), S. 59-67 
    Details
    ISSN: 1434-601X
    Keywords: 25.85.Ec ; 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An isomeric state at 3,523 keV excitation energy in97Y with a half-life of 144(10) ms has been discovered with the fission-product separator JOSEF. This isomer is depopulated through aγ transition of 162 keV. AnE3 multipolarity for this transition is consistent with the measured conversion coefficients ofα K =0.98(20) andα T =1.00(19). Subsequent electromagnetic transitions populate several new97Y levels which have high spins. For the isomer the three-quasiparticle configuration [πg 9/2⊗ν(h 11/2,g 7/2)]27/2− is proposed. TheE3 transition with a strength about 2 single-particle units is supposed to be of the typeh 11 2/+1 →d 5 2/−1 . These findings provide evidence for the rapid shape transition atA≃100 since they indicate shell-model character of 39 97 Y58 even at high excitation energies while the immediate neighbour 39 98 Y59 contains a rotational band based on a level at 495 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294555
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    Paper (German National Licenses)
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