SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Structure and Dynamics of Nuclei I

HK 9.3: Talk

Monday, March 20, 2023, 17:15–17:30, SCH/A118

Investigation of the dipole strength distribution in ⁷⁰Zn up to the particle threshold^a — •J. Hauf¹, V. Werner¹, M. Beuschlein¹, R. Beyer², T. Hensel², J. Isaak¹, J. Kleemann¹, P. Koseoglou¹, C. Nickel¹, O. Papst¹, N. Pietralla¹, K. Prifti¹, K. Römer², K. Schmidt², R. Schwengner², S. Turkat², J. Vogel¹, A. Wagner², and A. Yadev² — ¹IKP, TU Darmstadt — ²Helmholtz-Zentrum Dresden-Rossendorf

The dipole strength distribution of the neutron-rich nucleus ⁷⁰Zn has been investigated up to its particle threshold of around 9.2 MeV. This study is motivated by shedding light on the E1 strength, typically attributed to the pygmy dipole resonance on top of the low-energy tail of the giant dipole resonance. A Nuclear Resonance Fluorescence (NRF) experiment was conducted at the γELBE-Setup at the Helmholtz- Zentrum Dresden-Rossendorf using a bremsstrahlung beam with an endpoint energy of 11.5 MeV. The experiment will be described. NRF spectra and the status of the data analysis, including integrated NRF cross sections and transition strengths, will be presented and discussed.

^aThis work was supported by DFG project number 279384907-SFB 1245