Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Structure and Dynamics of Nuclei IV
HK 18.2: Vortrag
Montag, 28. März 2022, 16:30–16:45, HK-H7
Precise and Accurate Measurement of the Neutron-Neutron Scattering Length — •Marco Knösel1 and Thomas Aumann1,2,3 for the NeuLAND-SAMURAI collaboration — 1Technische Universität Darmstadt — 2GSI Helmholtz-Zentrum für Schwerionenforschung — 3Helmholtz Forschungsakademie Hessen für FAIR
In this contribution, a new experimental approach is presented to determine the neutron-neutron scattering length using the knockout reactions 6He(p,pα)2n and t(p,2p)2n as well as the charge-exchange reaction d(7Li,7Be)2n. In order to coincidently detect the two neutrons in the final states of these reactions with sufficient time and position accuracy, a new high-resolution neutron detector has to be developed. This is done at Technische Universität Darmstadt in cooperation with the SAMURAI collaboration at RIKEN in Japan, where the experiment will take place. The value of the neutron-neutron scattering length can be inferred from the comparison of the experimentally determined 2n relative-energy spectrum to halo EFT calculations.
This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245, the BMBF under contract number 05P21RDFN2 and the GSI-TU Darmstadt cooperation agreement.