Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.7: Poster

Donnerstag, 14. März 2024, 17:15–18:45, HBR 14: Foyer

Investigation of dipole excitations in ⁵⁰Ti by using the (d,pγ) reaction — •Jonathan Braumann, Markus Müllenmeister, Michael Weinert, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, Germany

The electric dipole strength around and below the neutron separation energy is known as Pygmy Dipole Resonance (PDR). Its exact emergence is still a part of research [1]. In recent years, there has been an increasing focus on investigating the PDR. Neutron transfer experiments have been established as a tool to investigate the single-particle nature of the PDR [2,3]. ⁵⁰Ti served as an initial start for studying the titanium isotope series, via using the (d,pγ) reaction on ⁴⁹Ti. ⁵⁰Ti may provide further insights of the emergence of the PDR in lighter nuclei. A total of 61 states were successfully identified. Through the integration of Nuclear Resonance Fluorescence (NRF) experiments, spin and parity assignments were possible for 28 states. By comparing the excitation strength one gathered information about the single particle character of the identified J=1 states. Furthermore, the experiment indicated the observation of spin-flip resonances at higher energies. Supported by the DFG (ZI 510/10-1).

[1] A. Bracco et al., Prog. Part. Nucl. Phys. 106 (2019) 360

[2] M. Spieker et al., Phys. Rev. Lett. 108 (2023) 014311

[3] M. Weinert et al., Phys. Rev. Lett. 127 (2021) 242501

Keywords: Pygmy Dipole Resonance; (d,pg) reaction; Titanium; single-particle excitation