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\title{Nuclear reactions as a tool to study the microscopic structure of pygmy and giant resonances}
\author{N. Tsoneva}
\affil{\small{Extreme Light Infrastructure (ELI-NP)$,$ Horia Hulubei National Institute for R$\&$D in Physics and Nuclear Engineering (IFIN-HH), Str. Reactorului No. 30, 077125 Bucharest-M$\check{a}$gurele, Romania}}
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\abstract{An advanced microscopic approach based on the energy density functional theory and the quasiparticle-phonon model has been implemented in studies of pygmy and giant resonances \cite{NT16,Len19}. In addition, the nuclear structure model is extended by a reaction theory for the calculation of (d,p)- and (d,p$\gamma$) reaction cross-sections in order to investigate the microscopic structure of the pygmy dipole resonance and its collectivity \cite{Spi20,Wei21}. Besides the single-particle nature of the excited states, various properties of the low-energy dipole strength emerge from the analysis of ($\gamma$,$\gamma'$) spectral distributions and branching ratios, from which the role of the quasicontinuum is investigated \cite{Wei21,Tso22}. Unprecedented access to the theoretical wave functions demonstrating the one-particle, one-hole neutron origin of the pygmy dipole resonance in the studied nuclei was achieved. The current studies will support day-one gamma-above-neutron-threshold experiments at ELI-NP targeting ground-state $\gamma$ decays of giant and pygmy resonances, as well as studies by multi-step $\gamma$ decays through low-lying states.}
\begin{thebibliography}{99}
\bibitem{NT16} N. Tsoneva, H. Lenske, \textit{Physics of Atomic Nuclei} \textbf{79} (2016) 885–903 and refs. therein.
\bibitem{Len19}Horst Lenske and Nadia Tsoneva, \textit{European Physical Journal} A, \textbf{55} (2019) 238.
\bibitem{Spi20} M. Spieker, A. Heusler, B. A. Brown, T. Faestermann, R. Hertenberger, G. Potel, M. Scheck, N. Tsoneva, M. Weinert, H.-F. Wirth, and A. Zilges, Phys.Rev.Lett. 125 (2020) 102503.
\bibitem{Wei21} M. Weinert, M. Spieker, G. Potel, N. Tsoneva, M. M\"uscher, J. Wilhelmy, and A. Zilges, submitted to Phys. Rev. Lett. (2021).
\bibitem{Tso22}T. Shizuma, S. Endo, A. Kimura, R. Massarczyk, R. Schwengner, R. Beyer, T. Hensel, H. Hoffmann, A. Junghans, K. Römer, S. Turkat, A. Wagner, and N. Tsoneva
Phys. Rev. C 106, 044326 (2022).
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