Lifetime measurements and shape coexistence in 97Sr

13 Jul 2022, 09:30
20m
IUC

IUC

Don Frana Bulića 4, Dubrovnik
Symmetries of interacting boson and/or fermion systems Symmetries of interacting boson and/or fermion systems

Speaker

Arwin Esmaylzadeh (Universitaet zu Koeln (DE))

Description

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 97 Sr were measured using the fast-timing technique [2]. The rapid change in ground-state deformation between the spherical 96 Sr (N=58) and the deformed 98 Sr (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 [5].

[1] P. Armbruster et al. NIM 139, 213 (1976)
[2] J.-M. Régis et al. NIMA 726, 191 (2013)
[3] J.-M. Régis et al. PRC 95, 054319 (2017)
[4] E. Clément et al. PRL 116, 022701 (2016)
[5] A. Esmaylzadeh et al. PRC 100, 064309 (2019)

Primary author

Arwin Esmaylzadeh (Universitaet zu Koeln (DE))

Co-authors

Dr J.-M. Régis (Universität zu Köln) Yung Hee KIM (Institut Laue-Langevin) Ulli Koester (Institut Laue-Langevin (FR)) Prof. Jan Jolie (Universität zu Köln) Vasil Karayonchev (Universitaet zu Koeln (DE)) Lukas Knafla (Universität zu Köln) K. Nomura (University of Zagreb) Mr L.M. Robledo (Universidad Autónoma de Madrid) Mr R. Rodríguez-Guzmán (Kuwait University)

Presentation materials