18-22 September 2023
GSI Darmstadt, Germany
Europe/Berlin timezone

Constraining the nuclear equation of state using Coulomb excitation of neutron-rich tin isotopes

20 Sep 2023, 12:10
Main Lecture Hall (GSI Darmstadt, Germany)

Main Lecture Hall

GSI Darmstadt, Germany

Südbau (SB1), GSI Campus
Oral Nuclear structure, short-range correlations and direct reactions Nuclear structure, short-range correlations and direct reactions


Ivana Lihtar (Institut Ruder Boškovic(IRB))


An experiment measuring the Coulomb-excitation cross section, σC [1] in neutron-rich tin nuclei
( 124 Sn– 134 Sn) at relativistic energies was performed at GSI, Darmstadt with the aim to constrain
the slope of the symmetry energy, L. This particular cross section correlates with dipole polariz-
ability, α D , a well-established observable for constraining L [2], which enables achieving the same
goal but in a simpler and more accurate manner with the used experimental setup [3].
Large acceptance spectrometer R3B-GLAD was used to conduct the experiment as a part of the
FAIR Phase-0 campaign [4]. Neutron-rich tin isotopes were produced in fragmentation and fission
reactions at energies close to 1 GeV/u, while a lead target was used to provide a strong field to
induce Coulomb excitations. At these energies, de-excitation occurs through the emission of gam-
mas and neutrons which were detected using the CALIFA gamma calorimeter [5] and NeuLAND
neutron detector [6].
In the scope of this contribution, ongoing analysis with some preliminary results will be presented.

[1] T.Aumann, C.A.Bertulani, Prog. Part. Nucl. Phys. 112 (2020) 103753
[2] S.Bassauer et al., Phys. Lett. B 810 (2020) 135804
[3] A.Horvat, Doctoral thesis, Technische Universität Darmstadt (2019)
[4] R3B Collaboration, https://www.r3b-nustar.de/.
[5] H. Alvarez Pol et al., Nucl. Instrum. Meths. Phys. Res. A 767, 453 (2014)
[6] K.Boretzky et al., Nucl. Instrum. Methods Phys. Res. A 1014 (2021) 165701

Primary author

Ivana Lihtar (Institut Ruder Boškovic(IRB))


Andrea Horvat (Ruđer Bošković Institute) Dr Dominic Michel Rossi (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Eleonora Kudaibergenova (IKP, TU Darmstadt) Hans Törnqvist (Chalmers University of Technology) Dr Igor Gašparić (Ruđer Bošković Institute) Dr Jose Luis Rodriguez Sanchez (University of Coruña) Martina Feijoo (Universidad de Santiago de Compostela(USC)) Thomas Aumann (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Valerii Panin (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))

Presentation Materials