SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 69: Structure and Dynamics of Nuclei XIV
HK 69.5: Vortrag
Donnerstag, 23. März 2023, 16:45–17:00, SCH/A118
Lifetime determination in 99Y, 99Zr and 99Nb via delayed γ-γ fast-timing spectroscopy — •Aaron Pfeil1, Jean-Marc Régis1, Jan Jolie1, Arwin Esmaylzadeh1, Mario Ley1, Lukas Knafla1, Ulli Köster2 und Yung Hee Kim2 — 1Institute for Nuclear Physics, University of Cologne — 2Institut Laue-Langevin, Grenoble, France
The experiment was performed in 2020 at the mass spectrometer Lohengrin at the Institut Laue-Langevin in Grenoble, France [1]. Lifetimes of the low-lying excited states in the nuclei 99Y, 99Zr and 99Nb were determined using the fast-timing technique [2]. This region is of special interest because of a rapid shape transition, which occurs by going from N = 58 to N = 60 and is especially pronounced in the Zr isotopes, where 98Zr is spherical and 100Zr is strongly deformed [3]. Therefore, the results from 99Zr provide crucial information about the spherical-deformed border at N = 59. Experimental values are compared to predictions calculated in the framework of the interacting boson-fermion model [4,5]. Work supported by DFG grant JO391/18.1 and the Institut Laue Langevin.
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[2] J.-M. Régis et al., Nucl. Instrum. Methods Phys. Res. 726 (2013)
[3] K.L.G. Heyde and J. L. Wood, Rev. Mod. Phys. 83, 1467 (2011)
[4] N. Gavrielov et al., Phys. Rev. C 106, L051304 (2022)
[5] K. Nomura et al., Phys. Rev. C 102, 034315 (2020)