SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Structure and Dynamics of Nuclei XII

HK 60.1: Vortrag

Donnerstag, 23. März 2023, 14:00–14:15, SCH/A215

Electron scattering off ¹⁰B under 180^∘ — •M. Spall, M. Singer, J. Birkhan, I. Brandherm, M. L. Cortés, F. Gaffron, K. E. Ide, J. Isaak, I. Jurosevic, P. von Neumann-Cosel, F. Niederschuh, N. Pietralla, G. Steinhilber, and T. Stetz — Institut für Kernphysik, Technische Universität Darmstadt

Electron scattering experiments under 180^∘ are an excellent tool to study transversal form factors of magnetic excitations due to the suppression of longitudinal excitations by several order of magnitudes with respect to the transversal excitations and the associated radiative tail background from elastic scattering at this angle. A measurement was performed with the 180^∘ system [1] at the S-DALINAC, in order to investigate the M3 transition of the 3⁺ ground state to the excited 0⁺ state at 1.74 MeV in ¹⁰B which is the analogue to the second-forbidden beta-decay of ¹⁰Be. The measurement will extend existing data towards lower momentum transfer allowing to improve the precision of the determined transition strength. The combined information from electron scattering and beta-decay will serve as a precision test of the unified description of electroweak observables in ab-initio models. First results of the new ¹⁰B(e,e’) data will be presented.

*Supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245.

[1] C. Lüttge et al., Nucl. Instrum. Meth. A 366, 325-331 (1995).