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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Structure and Dynamics of Nuclei VI

HK 26.2: Vortrag

Dienstag, 12. März 2024, 18:00–18:15, HBR 14: HS 4

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

Electron scattering experiments at a scattering angle of 180^∘ are an excellent tool to study transversal form factors of magnetic excitations. This is based on 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. The ¹⁰B(e,e^′) reaction was studied with the 180^∘ system [1] at the S-DALINAC. It was the aim to investigate the M3 excitation of the 3⁺ ground state of ¹⁰B to its excited 0⁺ state at 1.74 MeV. This is the isospin-analogue to the second-forbidden beta-decay of ¹⁰Be. The measurement will extend data on the form factor towards lower momentum transfer. This improves 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. The determined form factor of the investigated M3 transition of the 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).

Keywords: electron scattering; Boron-10; scattering angle of 180 deg; form factor; S-DALINAC