Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Structure and Dynamics of Nuclei IV

HK 18.4: Vortrag

Montag, 28. März 2022, 17:00–17:15, HK-H7

E1 strength distribution of ¹¹Li in Halo EFT — •Matthias Göbel¹, Daniel R. Phillips², and Hans-Werner Hammer^1,3 — ¹Technische Universität Darmstadt, 64289 Darmstadt, Germany — ²Ohio University, Athens, Ohio 45701, USA — ³ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany

Low-energy enhancements of E1 strength distributions are a characteristic property of halo nuclei. We use Halo EFT with a ⁹Li core and the two halo neutrons as degrees of freedom to calculate this observable for the two-neutron halo nucleus ¹¹Li.

The E1 strength distribution is significantly influenced by final-state interactions. We investigate their role and test different approximation schemes. The comparison of the leading-order results with experimental data from RIKEN [T. Nakamura et al., Phys. Rev. Lett. 96, 252502 (2006)] shows reasonable agreement.

This work was supported Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245 and by the U.S. Department of Energy (Contract No. DE-FG02-93ER40756).