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Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Structure and Dynamics of Nuclei III

HK 17.2: Vortrag

Dienstag, 31. März 2020, 17:30–17:45, J-HS E

Measurement of the total Neutron-Removal Cross Section of 120 Sn at R3B to determine Constraints on the Equation of State — •Ashton Falduto1,2, Andrea Horvat1,2, Dominic Rossi1, Thomas Aumann1,2, Carlos A. Bertulani3,1, and Stefan Typel1,2 for the R3B collaboration — 1TU Darmstadt — 2GSI Helmholzzentrum — 3Texas A&M University- Commerce

The knowledge of the equation of state (EOS) for neutron-rich matter is fundamental for understanding properties of, e.g., neutron stars, core-collapse supernova, and neutron-rich nuclei. Deriving experimental constraints for the EOS is thus of utmost importance. The parameter for the slope of the symmetry energy at saturation (L), in the EOS for asymmetric nuclear matter has not yet been constrained well experimentally so far. If determined accurately, the neutron-skin thickness and the ground-state dipole polarizabilty can potentially provide much better constraints on L. It has been shown that through an accurate measurement of the total neutron-removal cross section, the value of L can be constrained.The R3B setup has been upgraded to now include the neutron detector NeuLAND and the GLAD dipole magnet alongside our tracking setup, which will allow us to take measurements with high momentum resolution and large acceptance. This will allow us to get the accuracy required for constraining L. A first measurement for 120Sn has already been completed using the FAIR phase 0 R3B setup at GSI.

This project was supported by the BMBF project No. 05P15RDFN1 and the GSI-TU Darmstadt cooperation.

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