SMuK 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 32: Structure and Dynamics of Nuclei VI
HK 32.4: Vortrag
Mittwoch, 22. März 2023, 14:45–15:00, SCH/A215
Precise measurement of the nn scattering length using a new neutron detector — •Meytal Duer1, Thomas Aumann1,2,3, Dominic Rossi1,2, and Marco Knösel1 for the SAMURAI collaboration — 1Technische Universität Darmstadt — 2GSI Helmholtz-Zentrum für Schwerionenforschung — 3Helmholtz Forschungsakademie Hessen für FAIR
An accurate knowledge of the nucleon-nucleon (NN) scattering lengths, characterize the NN interaction at low energies, is fundamental for nuclear physics. The NN interaction is not only basis for the description of nuclei as a many-body systems, but the difference on the nn and pp interaction is also an important measure of charge symmetry breaking. For the nn scattering length, however, there is a systematic and significant discrepancy between values extracted from several measurements.
In this talk a new method will be presented to determine the nn scattering length with high accuracy. The basic idea of the measurement, which will take place at the SAMURAI experimental setup at RIBF in Japan, is to use a knockout reaction in inverse kinematics to produce a localized two-neutron system. By measuring the nn relative-energy spectrum after the reaction, the value of the nn scattering length can be extracted. To achieve sufficient precision, a newly developed high-resolution neutron detector HIME has been constructed. This work is supported by the DFG, Project-ID 279384907 - SFB 1245.