Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Instrumentation I

HK 9.5: Vortrag

Montag, 30. März 2020, 17:30–17:45, J-HS C

Status report on NEPTUN upgrade and first data analysis results — •Patrick van Beek1, Thomas Aumann1,2, Martin Baumann1, Alexander Fuchs1, Daniel Körper1,2, Yevhen Kozymka1, Heiko Scheit1, and Dmytro Symochko11TU Darmstadt — 2GSI Helmholtzzentrum

The low-energy photon tagging facility NEPTUN at the superconducting Darmstadt linear accelerator (S-DALINAC) can be used to study the photoabsorption cross section of nuclei in the energy regions of Pygmy Dipole and Giant Dipole Resonances. The electric dipole polarizability can be deduced from the photo nuclear response, which can be used to further constrain the symmetry energy in the equation of state.
After a major upgrade, the setup allows photoabsorption cross section measurements from 5 MeV – 35 MeV within a single spectrometer setting, effectively covering energies well below and far above particle separation threshold. It was furthermore extended by the target positioning system PROTEUS, which ensures a precise and rapid target exchange.
Commissioning data on 27Al has been taken. The current setup and the status of data analysis will be presented.

Supported by DFG (SFB 1245).

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