Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 7: Structure and Dynamics of Nuclei III
HK 7.5: Vortrag
Montag, 10. März 2025, 17:45–18:00, HS 2 Physik
Lifetime Measurements in odd-A Yttrium Isotopes — •Aaron Pfeil1, Arwin Esmaylzadeh1, Mario Ley1, Jean-Marc Régis1, Jan Jolie1, Ulli Köster2, Yung Hee Kim2, and Jean-Michel Daugas2 — 1Institute for Nuclear Physics, University of Cologne — 2Institut Laue-Langevin, Grenoble, France
Measurements were performed with neutron-rich nuclides produced by thermal neutron induced fission of 235U and mass-separated with the LOHENGRIN recoil spectrometer at the Institut Laue-Langevin in Grenoble, France. Lifetimes of low-lying excited states in the nuclei 95Y, 97Y, 99Y, and 101Y are determined using the fast-timing technique [1]. Investigating odd-A nuclei is of special interest for improving the development of theoretical models. In particular, the range from 95Y to 101Y offers valuable insight as these isotopes lie near the rapid shape transition at N = 59 and the critical point of the intertwined quantum phase transition. Furthermore, yttrium lies between strontium and zirconium, which are often considered as boson cores. Thus, it is interesting to determine which core is more appropriate, as this provides information about the character of the single particle energies. Experimental values are compared with calculations performed within the framework of the interacting boson-fermion model [2]. Work supported by DFG grant JOL391/18-2.
[1] J.-M. Régis et al., Nucl. Instrum. Methods Phys. Res. 726, 191 (2013)
[2] N. Gavrielov et al., Phys. Rev. C 106, L051304 (2022)
Keywords: Fast-Timing