Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 7: Structure and Dynamics of Nuclei III
HK 7.6: Vortrag
Montag, 10. März 2025, 18:00–18:15, HS 2 Physik
Lifetime measurements of the A=108 beta decay chain — •Senuri Dantanarayana1, Arwin Esmaylzadeh1, Mario Ley1, Jan Jolie1, J.-M. Régis1, Aaron Pfeil1, Ulli Köster2, Jean-Michel Daugas2, and Luis M. Fraile3 — 1Universität zu Köln, Institut für Kernphysik — 2Institut Laue-Langevin — 3Universidad Complutense de Madrid
Neutron-rich isobars in the β-decay chain of A=108 fission fragments were investigated following thermal neutron-induced fission of a 241Pu target and mass separation with the LOHENGRIN recoil separator at Institut Laue-Langevin. Lifetimes of excited nuclear states were measured using the fast-timing technique [1]. The focal plane of the spectrometer was equipped with one clover detector with four Ge crystals, four cylindrical 1.5″ × 1.5″ LaBr3(Ce) scintillator detectors and one plastic scintillator for beta detection [2]. The studied Ru-Pd region is known for gamma-softness where the spatial deformation of the nuclear density distribution shows large fluctuations around the equilibrium value [3]. The results of this work will be discussed in the context of gamma-softness.
[1] J.-M. Régis et al. , Nucl. Instrum. Meth. A- 955 (2019),- 163258.
[2] P. Armbruster et al. Nucl. Instrum. Meth.- 139 (1976),- 213.
[3] N. Nazir et al., Phys. Rev. C-,107 (2023) , L021303.
Keywords: Lifetime measurements; Fast-timing; gamma-softness