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Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Structure and Dynamics of Nuclei III

HK 22.8: Vortrag

Dienstag, 28. März 2017, 16:00–16:15, F 2

Sub-Shell Closure and Shape Coexistence in the transitional 98Zr — •W. Witt1, V. Werner1, M. Albers2, M. P. Carpenter2, R. V. F. Janssens2, T. Lauritsen2, G. Savard2, D. Seweryniak2, S. Zhu2, D. Cline3, A. B. Hayes3, C.-Y. Wu4, O. Möller1, N. Pietralla1, G. Rainovski5, R. Stegmann1, B. Bucher4, H. David2, J. Smith2, A. D. Ayangeakaa2, and C. Hoffman21IKP, TU Darmstadt, Deutschland — 2ANL, Argonne, USA — 3Univ. of Rochester, USA — 4LLNL, Livermore, USA — 5Univ. of Sofia, Bulgaria

Sub-shell closures are of special interest for nuclear structure studies. With Z = 40 Zr nuclei show a closed π2p1/2 sub-shell and allow for interesting insight into nucleon interactions in the Zr isotopic chain [1]. 98Zr is subject to coexistence of nuclear shapes between the mostly spherically shaped 96Zr and the strongly deformed 100Zr. The degree of mixing between different configurations is unclear as experimental constraints for model predictions are barely available. To study low-lying transitions in 98Zr a Coulomb excitation experiment was conducted at the ATLAS-facility at ANL making use of the GRETINA and CHICO2 arrays for γ- and particle-detection. This talk reports on the firstly determined B(E2; 21+ → 01+) value of 98Zr and its interpretation.
Supported by the BMBF under the grant 05P15RDFN9 within the collaboration 05P15 NuSTAR R&D.
C. Kremer et al., Phys. Rev. Lett. 117, 172503 (2016)

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