Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 55: Structure and Dynamics of Nuclei XII
HK 55.3: Vortrag
Donnerstag, 13. März 2025, 18:15–18:30, HS 2 Physik
Investigation of nuclear surface structure of exotic Xe isotopes with the PUMA aparatus — •Clara Klink1,2, Lukas Nies2, Alexandre Obertelli1, Frank Wienholtz1, Jonas Fischer1, and Moritz Schlaich1 — 1TU Darmstadt — 2CERN
PUMA (antiProton Unstable Matter Annihilation) is a new experiment at CERN since 2021. It aims to use antiprotons' unique properties to probe the nucleonic structure of both stable and exotic nuclei. After formation of antiprotonic atoms with the isotope of interest, antiprotons will annihilate on the nucleus's surface. This process yields annihilation products whose total electric charge allows to reconstruct the neutron-to-proton ratio on the surface of an isotope. These insights can provide a new perspective for investigating quantum phenomena such as nuclear halos and neutron skins. In order to trap antiprotons with exotic nuclei, PUMA aims to transport up to one billion antiprotons from the AD (Antiproton Decelerator) to the ISOLDE (Isotope Separator On-Line Device) facility.
In this talk, the current status and future plans for the experimental campaign of PUMA at ISOLDE is outlined. PUMA aims to measure before the LS3 the neutron-to-proton annihilation ratio of captured antiprotons in antiprotonic 115-144 Xe to extract a quantitative understanding of how the increasing number of neutrons in the isotopic chain changes neutron skin thickness. For this, a new transfer beamline is currently under construction at ISOLDE. Additionally, other exotic candidates for measurements with the PUMA setup are discussed and the transport of antiprotons from AD to ISOLDE detailed.
Keywords: Antiprotons; Nuclear Structure; Exotic Nuclei; PUMA experiment; ISOLDE