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  • 21.10.Pc  (2)
  • 02.90.+p  (1)
  • 21.60.−n  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Gaussian polynomial method for spin-dependent level density and new formula for spin distribution (1993)
    Springer
    The European physical journal 345 (1993), S. 343-357 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ma ; 02.90.+p
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Large-scale combinatorial calculations of level densities were performed for selected nuclei using Gaussian polynomial generating function method (GPM). Contrary to the results of previous combinatorial calculations, we find a good agreement of the combinatorial total level densities and Bethe formula. Combinatorial GPM calculations were performed also for spin-dependent level densities and comparison is made with various algebraic formulas. On the basis of our GPM calculations we propose a new phenomenological spin-dependent level density formula, which in the low-spin limit reduces to the spin-dependent formula of Bethe. The new formula (24) is for all spins factorized into the product of total level density and spin distribution function, where the spin distribution function (25) contains an additional spin correction parameter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282895
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    Paper (German National Licenses)
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  • 2
    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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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of the neutron-rich nucleus 37 94 rb57 (1989)
    Springer
    The European physical journal 334 (1989), S. 259-267 
    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 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284553
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    Paper (German National Licenses)
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  • 4
    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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    Paper (German National Licenses)
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