SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Structure and Dynamics of Nuclei IX

HK 49.3: Talk

Wednesday, March 22, 2023, 18:00–18:15, SCH/A118

Lifetime measurement of neutron rich Xe isotopes applying Fast-Timing method — •Andi Messingschlager¹, Martin von Tresckow¹, Thorsten Kröll¹, Matthias Rudigier¹, Andrey Blazhev², Julia Fischer², Sorin Pascu³, and Jonathan N. Wilson⁴ for the nu-Ball2 N-SI-120 collaboration — ¹TU Darmstadt — ²U Cologne — ³U Surrey — ⁴IJCLab Orsay

¹⁴²Xe is a neutron rich even-even isotope which lies between the double shell closure N = 82 and Z = 50 and a region in which an increased quadrupole and octupole collectivity is expected [1,2]. The lifetimes of excited states of ¹⁴²Xe are located in the range of some picoseconds. In this time range the Fast-Timing method is suited to determine the lifetime of exited states. Since there are different results for the lifetimes of excited states of the Xe-isotopes in experiments using the Fast-Timing method [1] and Coulomb exitation [2]. Therefore, we are going to analyse the data taken following the fission of ²³⁸U induced by a pulsed neutron beam of 1.7 MeV energy from the LICORNE neutron source. The nu-Ball2 multidetector array consisted of 24 HPGe Clover detectors and 20 LaBr₃(Ce) detectors which promise excellent energy and time resolution, respectively. The campaign was performed at IJCLab in Orsay, France. Preliminary results will be presented. Supported by BMBF under Verbundprojekt 05P2021 (ErUM-FSP T07) grant 05P21RDFN1 and ARIEL

[1] S. Ilieva et al., PRC 94, 034302 (2016).

[2] C. Henrich, Dissertation TU Darmstadt (2020)