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Träfflista för sökning "(WFRF:(Ragnarsson R)) srt2:(1995-1999) srt2:(1995)"

Sökning: (WFRF:(Ragnarsson R)) srt2:(1995-1999) > (1995)

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1.
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2.
  • Gale, S. J., et al. (författare)
  • Band termination spectroscopy in 157Er
  • 1995
  • Ingår i: Journal of Physics G: Nuclear and Particle Physics. - 0954-3899. ; 21:2, s. 193-213
  • Tidskriftsartikel (refereegranskat)abstract
    • The level scheme of 157Er has been extended from a spin region where the nucleus behaves as a prolate rotor to a region where the spin is produced by the alignment of all or most of the available valence nucleons along the symmetry axis of a weakly deformed oblate shape. The level scheme was established at high spin using up to four-fold gamma -ray coincidences detected in the Eurogam spectrometer following the reaction 114Cd( 48Ca,5n)157Er at a bombarding energy of 210 MeV. Particularly favoured states have been established at IK=69/2+, 81/2+, 71/2+, 77/2-, 87-/2 and 89-/2. Specific single-particle configurations are assigned to these special states by comparison with cranked Nilsson-Strutinsky calculations. These states are related to structures observed in the neighbouring nuclei 158Er and 157Ho. These data provide the spectrum of single-particle states for the lowest lying valence orbitals above the 146Gd closed core.
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3.
  • Thorslund, I., et al. (författare)
  • Intruder bands in Te114 : Smooth band termination
  • 1995
  • Ingår i: Physical Review C. - 0556-2813. ; 52:6, s. 2839-2843
  • Tidskriftsartikel (refereegranskat)abstract
    • The nucleus Te114 has been studied in heavy-ion -ray spectroscopy experiments performed with the early implementation of the GAMMASPHERE multidetector array. Three rotational intruder bands have been observed up to high spins. The yrast band, involving the 4p2h (h11/2)2(g7/2)2(g9/2)-2 proton configuration, reaches I=48Latin small letter h with stroke at an excitation energy of 30.3 MeV, the highest observed spin connected by rays in this mass region. The band properties are interpreted in the framework of smooth band termination.
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4.
  • Mullins, S. M., et al. (författare)
  • Strong population of a superdeformed band in Eu142
  • 1995
  • Ingår i: Physical Review C. - 0556-2813. ; 52:1, s. 99-103
  • Tidskriftsartikel (refereegranskat)abstract
    • A superdeformed band has been found in Eu142. It is populated with 1.2(2)% of the total -ray intensity that decayed into Eu142 via the reaction Sn120(27Al,5n)142Eu at 152 MeV. The strength of the band is similar to that previously reported in Eu143, where the superdeformed band is populated with an intensity of 1.1(1)%. This is unexpected, since both total Routhian surface (TRS) and cranked modified oscillator (MO) calculations predict that the superdeformed band in Eu143 becomes yrast at lower spin than that in Eu142. This difference is 4Latin small letter h with stroke in the MO calculations and 8Latin small letter h with stroke in the TRS. Extrapolation of the normal-deformed yrast states in Eu143 shows, however, that a difference of 8Latin small letter h with stroke in spin corresponds to a change in the relative energy of the superdeformed and normal-deformed yrast lines of only 1 MeV.
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