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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic moments of the 2 1 + states in102, 104Mo (1985)
    Springer
    The European physical journal 321 (1985), S. 593-598 
    Details
    ISSN: 1434-601X
    Keywords: 25.85.Ec ; 21.10.Ky ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theg factors of the first excited 2+ levels in the neutron-rich nuclei102Mo and104Mo have been studied through the measurement of the perturbed angular correlations for theγ-γ cascades between the 0 2 + -2 1 + -0 1 + level sequences. The results of g=0.42±0.07 for102Mo and ofg= −0.11 +0.12 for104Mo agree with the prediction of the vibrational-rotational model. In terms of IBA, with the assumption ofN π=3 for the Mo isotopes which takes into consideration a two particle, two-hole excitation across the Z=40 subshell, the proton-bosong factor is deduced to beg π=1.00±0.23. It is shown that this value provides evidence for subshell effects in100Zr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01432435
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  • 2
    Electronic Resource
    Electronic Resource
    The decay scheme of the 3-s Isomer of100Nb and the properties of levels in100Mo (1987)
    Springer
    The European physical journal 327 (1987), S. 119-126 
    Details
    ISSN: 1434-601X
    Keywords: 25.85.Ec ; 23.20.En ; 23.20.Gq ; 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theβ − decay of the longer-lived isomer in100Nb has been studied at the fission-product separator JOSEF. Measurements ofγ-ray singles spectra, ofγ-γ coincidences and ofγ-γ angular correlations have been performed. A value oft 1/2=2.99(11)s has been determined for the isomer which probably hasI π=4+ or 5+. A scheme of the levels of100Mo which are populated in the decay of this isomer has been established. Information on the spins of several states of100Mo has been obtained. Thus,I=0 levels have been identified at 1,505, 2,038 and 2,087 keV. The mixing ratios have been determined for the 22 +→21 + and 23 +→21 + transitions. The results provide evidence for a vibrational structure of100Mo with separate bands based on the ground state and on the first excited 0+ level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295258
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  • 3
    Electronic Resource
    Electronic Resource
    Proton-neutron multiplets in96Y (1988)
    Springer
    The European physical journal 329 (1988), S. 301-305 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Fw ; 23.20.Ck ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The structure of the nucleus 39 96 Y57 is discussed in the framework of the parabolic rule for the splitting of members of proton-neutron coupled configurations and of the interacting boson-fermion-fermion model (IBFFM). A good description of the available experimental data including the existence of theβ − decaying 8+ isomer with a half-life of 10 s has been obtained which demonstrates the influence of the subshell closures in the neighbourhood of 40 96 Zr56.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290235
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  • 4
    Electronic Resource
    Electronic Resource
    Nature of93Rb levels studied in IBFM (1989)
    Springer
    The European physical journal 333 (1989), S. 1-4 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Pc ; 21.60.Fw ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The structure of the low-lying states with negative parity of 37 93 Rb56 has been studied in the framework of the Interacting Boson-Fermion Model (IBFM) using the even-even neighbour 38 94 Sr56 as a core. A good description of the properties of the levels has been obtained. A sensitive test of the quality of the theoretical studies is the decay pattern of the second excited state at 267 keV with a half-life of 2.0(2) ns. The calculations givet 1/2=2.26 ns and they predict the existence of a 13 keV transition into the first excited state, the existence of which has been confirmed afterwards by experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290103
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  • 5
    Electronic Resource
    Electronic Resource
    Nuclear structure of97Y in the interacting boson-fermion model (1988)
    Springer
    The European physical journal 330 (1988), S. 365-369 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Fw ; 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Unique-parity states of97Y are studied in the framework of the interacting boson-fermion model (IBFM). Spin assignments for the levels of the unique-parity yrast band are proposed on the basis of nuclear systematics and the IBFM band pattern associated with coupling of a particle-type quasiparticle (g9/2) to the SU(5) core38 96Sr58. The good fit of the experimental data with the IBFM calculations confirms the single particle character of this immediate neighbour of the doubly sub-magic nucleus96Zr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290121
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  • 6
    Electronic Resource
    Electronic Resource
    Saturation of deformation atN=60 in the Sr isotopes (1990)
    Springer
    The European physical journal 337 (1990), S. 143-148 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.CK ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From the halflife oft 1/2=3.91 (16) ns for the 21 + state in100Sr a deformation parameter ofβ=0.40(1) has been derived. Within the given uncertainties, this value is equal to the recently determinedβ-parameters for98Sr and99Sr, indicating that in the Sr isotopes saturation of deformation is reached immediately at its onset well before neutron midshell. This behaviour is reflected by the “twin” character of98Sr and100Sr with identical features of their unperturbed ground-state rotational bands. These observations are discussed in terms of strong two-nucleon interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294285
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  • 7
    Electronic Resource
    Electronic Resource
    Structure of the Triplet of low-lying states in101Mo (1991)
    Springer
    The European physical journal 339 (1991), S. 269-278 
    Details
    ISSN: 1434-601X
    Keywords: 27.60.+j ; 23.20.−g ; 21.60.−n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The properties of the triplet of low-lying states in101Mo have been studied through spectroscopy of theγ radiation following thermal neutron capture in100Mo and β− decay of101Nb and through a measurement of the proton angular distributions in the100Mo(d,p) reaction with 14 MeV deuteron energy. The half-lives of the 13.5 keV state and the 57.0 keV 5/2+ state have been measured as 226(7) and 133(7)ns, respectively. These values and the quadrupole/dipole mixing ratios of the 13.5 keV and 43.5 keV transitions yield spin and parity 3/2+ for the 13.5 keV level. The E2 components in the 13.5 (3/2+ →1/2+) and 43.5 keV (5/2+→3/2+) transitions are ≦ 8·10−4 and 54(9)%, respectively. The possibility of an additional state near to the 57.0 keV level is discussed. IBFM/PTQM calculations, taking into consideration the transitional character of the100Mo boson core, account for the electromagnetic-transition and transfer-reaction pattern of the triplet of states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284064
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  • 8
    Electronic Resource
    Electronic Resource
    Beta decay of very neutron-rich110Mo studied at the new IGISOL facility (1994)
    Springer
    The European physical journal 350 (1994), S. 97-98 
    Details
    ISSN: 1434-601X
    Keywords: 27.60.+j ; 23.20.Lv
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decay of the new activity110Mo (t1/2=0.30(4).s) has been observed at the new IGISOL separator. Multiscaled singles,β-γ-t and γ-y-t coincidences were recorded. The decay scheme suggests Iπ=2+ for the ground state of the daughter nucleus110Tc. Three 1+ levels are fed with logft values below 5, indicating no drastic change among Mo and Ru decays at the middle of the neutron shell. This experiment confirms the expectation that the new IGISOL facility will allow the identification of one or two new more neutron-rich isotopes per element in this region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290676
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  • 9
    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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  • 10
    Electronic Resource
    Electronic Resource
    Structure of the highly deformed nucleus101Sr63 and evidence for identical K=3/2 bands (1995)
    Springer
    The European physical journal 352 (1995), S. 293-301 
    Details
    ISSN: 1434-601X
    Keywords: 27.60.+j ; 23.20.Lv
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The low-energy level scheme of theN=63 nucleus101Sr has been obtained from a β-decay study of101Rb. The ν[532]5/2 and ν[411]3/2 orbitals are well established as the ground state and a band head at 271.2keV, respectively. The general properties of the level scheme indicate a quadrupole deformation ofβ ≃ 0.4, confirming the unique feature of saturation of deformation inN ≥ 60 Sr isotopes. The energies of theK=3/2 intraband transitions in the odd-neutron neighbours99Sr61 and101Sr63 are very similar. More generally, the identical bands at low spin in98–101Sr nuclei are correlated with the mass-independent moments of inertia in this region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289502
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