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  • 21.60.Ev  (7)
  • 27.60.+j  (7)
  • 24.60.Ky  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    Calculation of nuclear structure of205Pb relevant for the205Tl bdsolar neutrino detector (1995)
    Springer
    The European physical journal 350 (1995), S. 319-325 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.60.Cs ; 21.60.Ev ; 23.20.Ck ; 27.80.+w ; 96.60.Kx
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Energy spectrum and electromagnetic properties of205Pb have been studied in the cluster-vibration model (CVM). The lifetime of 0.3 ms was predicted for the 2.3 keV level which is of significance for considerations of the205Tl solar neutrino detector.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01291189
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  • 2
    Digitale Medien
    Digitale Medien
    Level density fluctuations in the generalized interacting boson model (1992)
    Springer
    The European physical journal 344 (1992), S. 155-158 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 24.60.Ky ; 21.60.Ev ; 21.60.Fw
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Level density fluctuations are calculated within the generalized interacting boson model proposed for even-even nuclei, in dependence on the truncation parameterk. For the case ϰ=2 corresponding to theSU(3) dynamical symmetry of the interacting boson model the fluctuation pattern is close to Poissonian. For cases ϰ≠2, including the anharmonic vibrator model for which ϰ=∞, a rapid transition to the fluctuation pattern close to GOE is obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01291699
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  • 3
    Digitale Medien
    Digitale Medien
    Pseudobands in non-SU(3) odd-mass nuclei and coherent state structures of quadrupole phonons (1987)
    Springer
    The European physical journal 327 (1987), S. 393-396 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Re ; 21.60.Ev
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Ground state symmetric rotor bands are described as coherent-state structures of deformation in a quadrupole-phonon model. These structures are shown to be very different from the phonon composition of pseudobands which are culled from the excited state spectrum of nuclei such as75Se,75Kr, and77Kr. The pseudobands are shown to be only a subset of more complete excitation spectra, which occur in most unique-parity odd-nucleon nuclei with a transitional core and can be expected to occur throughout the chart of the nuclides.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289563
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  • 4
    Digitale Medien
    Digitale Medien
    Low-lying states and degree of chaoticity of40K in IBFFM (1988)
    Springer
    The European physical journal 330 (1988), S. 141-152 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 23.20.Gq ; 21.60.Fw ; 24.60.Ky
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The results of aγ-γ angular correlation and a low energyγ-ray singles measurement using thermal neutron capture in39K are presented. The properties of low-lying levels of40K are interpreted in a comparison of the experimental data with the Interacting-Boson-Fermion-Fermion Model (IBFFM). The level fluctuation properties of the IBFFM spectrum are analysed and a sizeable deviation from chaoticity is found.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01293389
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  • 5
    Digitale Medien
    Digitale Medien
    Nuclear structure of97Y in the interacting boson-fermion model (1988)
    Springer
    The European physical journal 330 (1988), S. 365-369 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.60.Fw ; 23.20.Lv ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01290121
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  • 6
    Digitale Medien
    Digitale Medien
    Nature of93Rb levels studied in IBFM (1989)
    Springer
    The European physical journal 333 (1989), S. 1-4 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Pc ; 21.60.Fw ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01290103
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  • 7
    Digitale Medien
    Digitale Medien
    Proton-neutron multiplets in96Y (1988)
    Springer
    The European physical journal 329 (1988), S. 301-305 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.60.Fw ; 23.20.Ck ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01290235
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  • 8
    Digitale Medien
    Digitale Medien
    Quantum chaos forN=79 nuclei in the IBFM model (1990)
    Springer
    The European physical journal 337 (1990), S. 131-137 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Ma ; 24.60.Ky ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Spectral rigidityΔ 3 (L) is calculated for the energy spectra of131Te,135Ba and137Ce, obtained in the IBFM calculation. Results reveal an intermediate situation between regularity and chaos, but remarkably closer to the chaotic limit. Influence of the model parameters on the fluctuation pattern is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294283
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  • 9
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): 23.20.Lv ; 21.60.Ev ; 23.20.−g
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294286
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  • 10
    Digitale Medien
    Digitale Medien
    Structure of the neutron-rich nucleus 37 94 rb57 (1989)
    Springer
    The European physical journal 334 (1989), S. 259-267 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Pc ; 21.60.Fw ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A level scheme has been established for 37 94 Rb57 based on studies at the fission-product separator JOSEF ofγγ coincidences following theβ- decay of94Kr. For the 190.7 keV level a half-life of 2.5(8) ns has been determined through the centroid-shift method. The majorβ-decay branch of94Kr proceeds with log ft=3.7 into the 988.4 keV state in94Rb. This transition must be of the 0+→1+ GT type involving the transitionνg7/2→πg9/2. IBFFM calculations have been performed for94Rb, starting from the parametrization used in the previous IBM investigations for the isotope93Rb and the isotone96Y. A theoretical interpretation of the low-lying levels including propositions for the spins is given in a comparison to the available data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01284553
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