Erlangen 2026 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Nuclear Astrophysics III
HK 25.4: Talk
Wednesday, March 18, 2026, 14:45–15:00, PHIL A 602
Proof-of-principle neutron photo-dissociation measurement in the 7Li(e,e’n)6Li reaction — •Davud Sokolovic1, Jan Butz1, Pierre Capel2, Tanja Heftrich1, Michael Heil3, Carolin Grün1, Samira Ikerkourn1, Felix Panholzer1, and Concettina Sfienti2 — 1Goethe-Universität, Frankfurt am Main, Deutschland — 2Johannes Gutenberg-Universität, Mainz, Deutschland — 3GSI, Darmstadt, Deutschland
As neutron capture processes are fundamental to our understanding of the element abundance distribution in the universe, measurements of (n, γ) in direct kinematics are essential. For many nuclei, these measurements are not easily accessible due to low reaction rates or strong backgrounds from competing channels. Thus, time-reversed reactions induced by virtual photons provide a complementary approach to determine neutron capture cross sections via detailed balance.
In this talk, the concept and first steps of a proof-of-principle neutron photo-dissociation measurement in the 7Li(e,e′n)6Li reaction at the Mainz Microtron (MAMI) are presented including GEANT4 simulation studies used to map electromagnetic and photonuclear backgrounds and to optimise the placement of a lithium-glass neutron detector.
The kinematic strategy is chosen to mimic an s-wave entrance channel into a p-wave bound state, favouring an E1 transition to the ground state. In view of these requirements, DICEBOX simulations are performed to estimate ground-state branching ratios and identify further target candidates. The status of the analysis will be reported.
Keywords: Neutron Photodissociation; Neutron Capture Cross Sections; GEANT4 Simulations; DICEBOX Simulations; Detailed Balance