Band crossings and signature splitting in 159Ho

High spin states in 159 Ho were populated in the reaction 152 Sm(11 B,4n) at 60 MeV. The rotational band based on the 7/2+ [404] Nilsson configuration has been established and the rotational bands based on the 7/2- [523], 1/2+ [411] and 1/2- [541] Nilsson configurations have been extended. The neutron band crossings of the various bands and the energy signature splitting of the 7/2- [523] bands are analysed in terms of the cranked shell model.

[1]  J. Simpson,et al.  Loss of alignment gain in the πh9/2[541 1/2−] ⊗ (νi13/2)2 band in 167Tm and neighbouring odd-Z N = 98 nuclei , 1997 .

[2]  A. Smith,et al.  Electromagnetic properties of 161Tm at high spin , 1995 .

[3]  R. Helmer Nuclear data sheets update for A = 159 , 1994 .

[4]  H. R. Andrews,et al.  Multiple band structure and band termination in 157Ho towards complete high-spin spectroscopy , 1992 .

[5]  S. Leoni,et al.  Interaction strength and shape difference for the h9/2 and h11/2 configurations in163Tm , 1991 .

[6]  A. Smith,et al.  Configuration-dependent transition rates in 157Ho , 1990 .

[7]  W. Nazarewicz,et al.  Equilibrium deformations and excitation energies of single-quasiproton band heads of rare-earth nuclei , 1990 .

[8]  P. Ekström,et al.  High-spin spectroscopic study of 167Lu , 1990 .

[9]  M. Riley,et al.  Near-yrast discrete line γ-ray spectroscopy of 159Er and 160Er to I⩾ or ≈40h̄ , 1987 .

[10]  S. Frauendorf,et al.  Quasiparticle levels in rotating rare earth nuclei: A cranked shell-model dictionary , 1986 .

[11]  S. Frauendorf,et al.  Triaxial shapes of rotating nuclei with neutron numbers 88, 89, 90 , 1983 .

[12]  J. Boutet Levels in159Ho as populated from decay of159Er , 1977 .

[13]  L. Funke,et al.  Energy levels in159Ho from159Tb(α, 4nγ)159Ho and159Tb(3He, 3nγ)159Ho reactions , 1977 .

[14]  A. Špalek,et al.  Anomalous rotational energies and transition probabilities at high spin in the ground-state band in 159Ho , 1975 .

[15]  E. Grosse,et al.  BACKBENDING IN ODD-A Ho ISOTOPES , 1974 .

[16]  H. Ryde,et al.  Nuclear moment of inertia at high rotational frequencies , 1972 .