München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Structure and Dynamics of Nuclei III
HK 21.5: Talk
Tuesday, March 19, 2019, 15:15–15:30, HS 14
Lifetime determination in 97Sr via delayed γ-γ fast-timing spectroscopy — •Arwin Esmaylzadeh1, Jean-Marc Régis1, Jan Jolie1, Ulli Köster2, and Yung Hee Kim2 — 1Institute for Nuclear Physics, University of Cologne — 2Institut Laue-Langevin, Grenoble
Delayed γ rays from neutron rich A=97 fission fragments were measured using the Lohengrin spectrometer at the reactor of the Institut Laue-Langevin in Grenoble [1]. Several lifetimes of excited states in 97Sr were measured using the fast-timing technique [2]. The rapid change in ground-state deformation between the spherical 96Sr (N=58) and the deformed 98Sr (N=60) is well known [3,4]. Therefore, it is of particular interest to study the shape-coexisting structures at the spherical-deformed border (N=59). With the extracted transition probabilities the type of excitation of some states could be studied and assigned.
[1] P. Armbruster et al., Nucl. Instrum. Methods 139 (1976)
[2] J.-M. Régis et al., Nucl. Instrum. Methods Phys. Res. 726 (2013)
[3] J.-M. Régis et al., Phys. Rev. C 95, 054319 (2017)
[4] E. Clément et al., Phys. Rev. Lett. 116, 022701 (2016)