München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Structure and Dynamics of Nuclei IX
HK 49.4: Vortrag
Donnerstag, 21. März 2019, 15:00–15:15, HS 14
RDDS Lifetime Measurement on Zr-98 - Fixing the Critical Point of the Quantum Phase Transition — •W. Witt1, 2, V. Werner1, N. Pietralla1, C. Costache1, 3, T. Glodariu3, P. John1, R. Kern1, P. Koseoglou1, 2, N. Marginean3, R. Mihai3, A. Mitu3, S. Pascu3, P. Petkov3, L. Stan3, A. Turturica3, S. Ujeniuc3, and J. Wiederhold1 — 1IKP TU Darmstadt, Darmstadt, Deutschland — 2GSI, Darmstadt, Deutschland — 3IFIN-HH, Magurele, Rumänien
Recent theoretical work emphasizes the contribution of the tensor interaction between nucleons to the structural evolution in nuclei [1]. The Zr isotopic chain was suggested as example of the predicted shape phase transition. Our previous experimental results [2] established the nucleus Zr-98 as closest to the critical point in this uniquely-abrupt structural change. The presented follow-up RDDS level lifetime measurement on Zr-98 significantly improves on the accuracy of the previous results and agrees with other recent result [3]. It allows further interpretation in the frame of type-II shell evolution and corresponding state-of-the art shell-model calculations.
[1] T. Togashi et al., Phys. Rev. Lett. 117, 172502 (2016)
[2] W. Witt et al., Phys. Rev. C 98, 041302(R) (2018)
[3] P. Singh et al., Phys. Rev. Lett. 121, 192501 (2018)