Pygmy dipole resonance built on excited states: A microscopic multiphonon investigation

Open Access

Issue		EPJ Web Conf. Volume 342, 2025 14^th International Spring Seminar on Nuclear Physics “Cutting-Edge Developments in Nuclear Structure Physics”


Article Number		01015
Number of page(s)		7
DOI		https://doi.org/10.1051/epjconf/202534201015
Published online		21 November 2025

A. Leistenschneider, T. Aumann, K. Boretzky, D. Cortina, J. Cub, U. Datta Pramanik, W. Dostal, T.W. Elze, H. Emling, H. Geissel et al., Photoneutron cross sections for unstable neutron-rich oxygen isotopes, Phys. Rev. Lett. 86, 5442 (2001). [Google Scholar]
E. Tryggestad, T. Aumann, T. Baumann, D. Bazin, J.R. Beene, Y. Blumenfeld, B.A. Brown, M. Chartier, M.L. Halbert, P. Heckman et al., Low-lying dipole strength in ²⁰O, Phys. Lett. B 541, 52 (2002). [Google Scholar]
N. Ryezayeva, T. Hartmann, Y. Kalmykov, H. Lenske, P. von Neumann-Cosel, V.Yu. Ponomarev, A. Richter, A. Shevchenko, S. Volz, J. Wambach, Nature of low-energy dipole strength in nuclei: The case of a resonance at particle threshold in ²⁰⁸Pb, Phys. Rev. Lett. 89, 272502 (2002). [Google Scholar]
A. Klimkiewicz, N. Paar, P. Adrich, M. Fallot, K. Boretzky, T. Aumann, D. Cortina-Gil, U. Datta Pramanik, T.W. Elze, H. Emling et al., (LAND Collaboration), Nuclear symmetry energy and neutron skins derived from pygmy dipole resonances, Phys. Rev. C 76, 051603 (2007). [CrossRef] [Google Scholar]
R. Schwengner, G. Rusev, N. Benouaret, R. Beyer, M. Erhard, E. Grosse, A.R. Junghans, J. Klug, K. Kosev, L. Kostov et al., Dipole response of ⁸⁸Sr up to the neutronseparation energy, Phys. Rev. C 76, 034321 (2007). [Google Scholar]
D. Savran, M. Babilon, A.M. van den Berg, M.N. Harakeh, J. Hasper, A. Matic, H.J. Wörtche, A. Zilges, Nature of the pygmy dipole resonance in ¹⁴⁰Ce studied in (a, a'y) experiments, Phys. Rev. Lett. 97, 172502 (2006). [Google Scholar]
I. Poltoratska, P. von Neumann-Cosel, A. Tamii, T. Adachi, C.A. Bertulani, J. Carter, M. Dozono, H. Fujita, K. Fujita, Y. Fujita et al., Pygmy dipole resonance in ²⁰⁸Pb, Phys. Rev. C 85, 041304(2012). [CrossRef] [Google Scholar]
S. Goriely, Radiative neutron captures by neutron-rich nuclei and the r-process nucleosynthesis, Phys. Lett. B 436, 10 (1998). [CrossRef] [Google Scholar]
A. Tonchev, N. Tsoneva, C. Bhatia, C. Arnold, S. Goriely, S. Hammond, J. Kelley, E. Kwan, H. Lenske, J. Piekarewicz et al., Pygmy and core polarization dipole modes in ²⁰⁶Pb: Connecting nuclear structure to stellar nucleosynthesis, Physics Letters B 773, 20 (2017). [CrossRef] [Google Scholar]
D. Savran, T. Aumann, A. Zilges, Experimental studies of the pygmy dipole resonance, Prog. Part. Nucl. Phys. 70, 210 (2013). [CrossRef] [Google Scholar]
T. Aumann, Low-energy dipole response of exotic nuclei, Eur. Phys. J. A p. 234 (2019). [Google Scholar]
E. Lanza, L. Pellegri, A. Vitturi, M. Andrés, Theoretical studies of pygmy resonances, Progress in Particle and Nuclear Physics 129, 104006 (2023). [CrossRef] [Google Scholar]
M.N.H.E.A.R. Li, V.Yu. Ponomarev, First evidence for non 1^- pygmy dipole resonance in neutron-rich nuclei (2023) [Google Scholar]
L.T. Phuc, N.D. Dang, R. Li, N.Q. Hung, Possible existence of the pygmy dipole resonance built on excited states in the neutron-rich ⁸⁰Ge nucleus, Phys. Rev. C 110, 064323 (2024). [Google Scholar]
F. Andreozzi, F. Knapp, N. Lo Iudice, A. Porrino, J. Kvasil, Exact formulation and solution of the nuclear eigenvalue problem in a microscopic multiphonon space, Phys. Rev. C 75, 044312 (2007). [Google Scholar]
D. Bianco, F. Knapp, N. Lo Iudice, F. Andreozzi, A. Porrino, Upgraded formulation of the nuclear eigenvalue problem in a microscopic multiphonon basis, Phys. Rev. C 85, 014313 (2012). [CrossRef] [Google Scholar]
F. Knapp, N. Lo Iudice, P. Vesely, F. Andreozzi, G. De Gregorio, A. Porrino, Dipole response in²⁰⁸ Pb within a self-consistent multiphonon approach, Phys Rev. C 92, 054315 (2015). [Google Scholar]
G. De Gregorio, J. Herko, F. Knapp, N. Lo Iudice, P. Vesely, Ground-state correlations within a nonperturbative approach, Phys Rev. C 95, 024306 (2017). [Google Scholar]
F. Knapp, P. Papakonstantinou, P. Vesely, G. De Gregorio, J. Herko, N. Lo Iudice, Comparative analysis of formalisms and performances of three different beyond-mean-field approaches, Phys. Rev. C 107, 014305 (2023). [Google Scholar]
G. De Gregorio, F. Knapp, N. Lo Iudice, P. Vesely, Microscopic multiphonon approach to spectroscopy in the neutron-rich oxygen region, Phys. Rev. C 97, 034311 (2018). [Google Scholar]
G. De Gregorio, F. Knapp, N. Lo Iudice, P. Vesely, Microscopic multiphonon approach to nuclei with a valence hole in the oxygen region, Phys. Rev. C 99, 014316 (2019). [Google Scholar]
F. Knapp, N. Lo Iudice, P. Vesely, F. Andreozzi, G. De Gregorio, A. Porrino, Dipole response in ¹³²Sn within a self-consistent multiphonon approach, Phys. Rev. C 90, 014310 (2014). [Google Scholar]
G. De Gregorio, F. Knapp, N. Lo Iudice, P. Vesely, Self-consistent quasiparticle formulation of a multiphonon method and its application to the neutron-rich ²⁰O nucleus, Phys Rev. C 93, 044314 (2016). [Google Scholar]
A. Ekström, G. Baardsen, C. Forssén, G. Hagen, M. Hjorth-Jensen, G.R. Jansen, R. Machleidt, W. Nazarewicz, T. Papenbrock, J. Sarich et al., Optimized chiral nucleon-nucleon interaction at next-to-next-to-leading order, Phys. Rev. Lett. 110, 192502 (2013). [Google Scholar]
D. Bianco, F. Knapp, N. Lo Iudice, P. Vesely, F. Andreozzi, G. De Gregorio, A. Porrino, A self-consistent study of multipole response in neutron-rich nuclei using a modified realistic potential, J. Phys. G: Nucl. Part. Phys. 41, 025109 (2014). [Google Scholar]

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