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Sökning: (WFRF:(Wilson P. W. F.)) > (1996-1999)

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1.
  • Clark, R M, et al. (författare)
  • Superdeformation in bismuth
  • 1996
  • Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 53:1, s. 117-123
  • Tidskriftsartikel (refereegranskat)abstract
    • High angular momentum states in Bi-195-197 are populated in two reactions: W-183(F-19,xn)Bi-202-x and Ta-181(Ne-20,xn)Bi-201-x at beam energies of 108 and 123 MeV, respectively. Gamma rays were detected using the Gammasphere array. Three weakly populated rotational sequences have been found. They each have properties characteristic of other superdeformed bands in this mass region. On the basis of cross-bombardment information we believe that one band belongs to each of Bi-195, Bi-196, and Bi-197. The properties of the bands in the odd-Bi nuclei are best reproduced if the odd proton occupies the favored signature of the [651]1/2 orbital, while the band in Bi-196 has this same proton configuration coupled to an additional N=7 (j(15/2)) neutron. The relative behavior of the J((2)) moments of inertia can be qualitatively understood in terms of Pauli-blocking effects.
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2.
  • Beausang, C W, et al. (författare)
  • Lifetimes of yrast and excited superdeformed states in Gd-150 : effect of particle-hole excitations on the deformation
  • 1998
  • Ingår i: Physics Letters B. - 0370-2693 .- 1873-2445. ; 417:1-2, s. 13-19
  • Tidskriftsartikel (refereegranskat)abstract
    • The quadrupole moments and deformations have been measured for six superdeformed bands in Gd-150. The results indicate evidence for deformation driving properties of both the high-hi intruder and also low-N natural parity states at the superdeformed Fermi surface. Several new transitions have been identified and placed in the low spin non-yrast portion of one of the SD bands.
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3.
  • Svensson, C. E., et al. (författare)
  • Decay Out of the Doubly Magic Superdeformed Band in the N=Z Nucleus 60Zn
  • 1999
  • Ingår i: Physical Review Letters. - 1079-7114. ; 82:17, s. 3400-3403
  • Tidskriftsartikel (refereegranskat)abstract
    • The doubly magic superdeformed band in the N = Z nucleus Zn-60 has been identified. Linking transitions connecting this band to the yrast line provide the first spin, parity, and excitation energy measurements for superdeformed states in the A similar to 60 region. The stretched-E2 character and relatively large B(E2) values of these transitions suggest a nonstatistical decay-out process.
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