{gamma}-ray spectroscopy of {sup 163}Ta

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.054316· OSTI ID:21296488

Sandzelius, M ^[1]; Cederwall, B; Andgren, K; Baeck, T; Hadinia, B; Johnson, A; Khaplanov, A; Wyss, R ^[1]; Ganioglu, E ^[1]; Thomson, J; Bianco, L; Joss, D T; Page, R D ^[2]; Eeckhaudt, S; Grahn, T; Greenlees, P T; Jones, P M; Julin, R; Juutinen, S; Ketelhut, S ^[3]

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1. Department of Physics, Royal Institute of Technology, S-10691 Stockholm (Sweden)
2. Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
3. Department of Physics, University of Jyvaeskylae, FIN-40014 Jyvaeskylae (Finland)

Excited states in {sup 163}Ta have been identified for the first time using the {sup 106}Cd({sup 60}Ni,3p) fusion evaporation reaction. {gamma} rays were detected using the JUROGAM {gamma}-ray spectrometer and recoil discrimination was achieved using the recoil ion transport unit (RITU) gas-filled separator in conjunction with the GREAT spectrometer situated at the focal plane of the RITU. The yrast states are assigned to a strongly coupled rotational band based on a {pi}h{sub 11/2} configuration. This structure exhibits large signature splitting at low spins that disappears after the paired band crossing because of the alignment of a pair of i{sub 13/2} neutrons. This effect is ascribed to triaxial shape changes induced by the core-polarizing properties of the deformation-aligned h{sub 11/2} proton and the rotation-aligned i{sub 13/2} neutrons. Two additional strongly coupled band structures have been established and are discussed in terms of octupole-vibrational and two-quasiparticle excitations built on the yrast structure. The experimental results are compared with predictions from cranked-shell-model and total-Routhian-surface calculations.

• OSTI ID: 21296488
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevC.80.054316; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CADMIUM 106 TARGET
CONFIGURATION
EVAPORATION
EXCITATION
EXCITED STATES
FORECASTING
GAMMA RADIATION
GAMMA SPECTROSCOPY
IONS
NEUTRONS
NICKEL 60
NICKEL 60 REACTIONS
PROTON-EMISSION DECAY
PROTONS
ROTATIONAL STATES
SHELL MODELS
SPIN
SURFACES
TANTALUM 163
YRAST STATES