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  • 1990-1994  (3)
  • 21.10.Re  (2)
  • 21.10.Hw  (1)
  • 21.60.Ev
  • Nuclear reactions
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  • 1
    Electronic Resource
    Electronic Resource
    TheN=83 nucleus149Dy from Gamow-Teller decay of its 11/2− and 1/2+ 149Ho parents (1994)
    Springer
    The European physical journal 349 (1994), S. 13-24 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Pc ; 21.10.Re ; 23.20.Lv ; 23.40.Hc ; 27.60.tj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A high-sensitivityγ-spectroscopic study of the149Hoπh 11/2 andπs 1/2 β-decays using mass separated sources has located dominant 0+ → 1+ GT decay strength associated with decay of pairedh 11/2 protons, leading to 3п-states in the149Dy daughter nucleus. In theirγ-decay low-lying149Dy levels characteristic of anN=83 nucleus are excited. They include theνf 7/2,νp 3/2,νh 9/2 andνp 1/2 single particle- and theνs 1 2/−1 andνd 3 2/−1 two-particle one-hole states, as well as the νf 7/2 × 3− andνf 7/2 × 2+ particle-phonon multiplets. A synopsis is given of these excitations in theN=83 isotones from149Nd to153Yb. The149Dy GT decay strength is discussed in terms of the147Tb82 and148Dy82 decays. The strength function results are also compared with independent149Ho 11/2− decay data from the literature based on totalγ-ray absorption measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01296328
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    γ-decay of the particle-hole states with the highest spins in208Pb (1993)
    Springer
    The European physical journal 344 (1993), S. 363-367 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Hw ; 21.60.Cs ; 23.20.Lv ; 25.70.Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 208Pb has been excited with inelastic heavy ion scattering of 350 MeV64Ni and 420 MeV82Se on a thick208Pb target. Withγ -γ coincidence measurements 2 new decays of the 10+ isomer, namely a 34.5 keVE2-transition to 8 2 + and a 857.7 keVE3 transition to 7− have been found and the wavefunctions of the participating levels deduced. An observed gamma cascade of 295.3, 348.0, 865.4 and 340.2 keV on top of the 10+ isomer is assigned to the particle-hole states with the highest spins 14− 6744.1 keV→13− 6448.9 keV→12+ 6100.9 keV→11+ 5235.6 keV→10+ 4895.4 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283191
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Shell model and octupole states in148Gd from in-beam experiments (1990)
    Springer
    The European physical journal 337 (1990), S. 387-406 
    Details
    ISSN: 1434-601X
    Keywords: 27.60.+j ; 21.10.Re ; 21.60.Cs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Through (α, 4n) and (τ, 3n) reactions the high-spin states in the two-neutron nucleus148Gd were populated up toI π=21− at 7.2 MeV, including numerous states above the yrast line. The148Gd energy spectrum is interpreted in terms of the spherical shell model. Identification of the (νf 7/2 i 1 3/2)10− state gives the νi 13/2 single particle energy free of octupole admixtures as 2.1(1) MeV. Eight high-spin states between 1.2 and 3.7 MeV were identified as the couplings of the two valence-particles to the146Gd octupole phonon, and three above-lying levels are assigned as double-octupole excitations including a 12+ state which decays by anE3-E3 stretched cascade. All these octupole levels can be quantitatively predicted from the one-particle x phonon spectrum of147Gd. The high-spin states above 3 MeV are four-quasiparticle excitations ofπ +1 π −1 ν 2 andπ 2 ν 2 type and their energies are in good accord with shell model estimates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294976
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    Paper (German National Licenses)
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