Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 38: Instrumentation VII

HK 38.7: Vortrag

Mittwoch, 1. April 2020, 18:15–18:30, J-HS C

Commissioning Experiment for (e,e’γ) Measurements at the S-DALINAC * — •Gerhart Steinhilber1, Antonio D’Alessio1, Jonny Birkhan1, Johann Isaak1, Lars Jürgensen1, Tobias Klaus1, Ronan Lefol2, Peter von Neumann-Cosel1, Norbert Pietralla1, Philipp C. Ries1, and Maxim Singer11Institut für Kernphysik, TU Darmstadt — 2Laval University

High resolution electron scattering experiments at low momentum transfer are performed at the S-DALINAC using the QCLAM spectrometer at the Institut für Kernphysik at the TU Darmstadt. The QCLAM spectrometerfeatures a comparatively large solid-angle coverage of 35 msr and a momentum acceptance of 20%. This makes it suitable for (e,e’x) coincidence measurements.

**We combine the large acceptance QCLAM spectrometer with fast timing LaBr:Ce detectors to perform (e,e*γ) coincidence experiments. The excitation of the nuclei is studied by measuring inelastically scattered electrons, so that the energy of the excited state is known. It’s γ-decays are measured in coincidence by an array of high efficiency LaBr:Ce detectors with excellent timing properties.

**The combined data acquisition (DAQ) of the QCLAM spectrometer and the LaBr detectors has been tested by observing off-beam cosmic radiation showers. A comissioning experiment with a 30.5-MeV electron beam impinging on a carbon target was performed. Experimental setup, DAQ and results from the commissioning experiment will be presented. **
* Supported by the DFG within the CRC 1245.

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