Erlangen 2026 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Nuclear Astrophysics III
HK 25.6: Talk
Wednesday, March 18, 2026, 15:15–15:30, PHIL A 602
Geant4 simulation towards the measurements of 2H(d,p)3H and 2H(d,n)3He reactions at the DT generator of TU Dresden — •Frederik Uhlemann, Björn Lehnert, Max Osswald, Steffen Turkat, and Kai Zuber — Institut für Kern- und Teilchenphysik, TU Dresden
The 2H(d,p)3H and 2H(d,n)3He reactions are critical for determining the primordial deuterium abundance D/H after Big Bang nucleosynthesis. Improved cross section data for these channels would reduce the uncertainty on the cosmic baryon density Ωbh2. The resulting value could reach a precision comparable to that of the CMB, while remaining fully independent. This would improve our understanding of early universe physics and provides a powerful cross-check for entirely independent fields of (astro-)physics.
The Deuterium-Tritium neutron generator of TU Dresden is a unique facility in Europe that was mainly used for fusion research so far. Based on its new ASTRO beam line, this facility will be capable to measure these two reaction channels from 10 keV to 350 keV, which covers the entire energy range relevant for BBN. Measurements of the two deuterium reactions using solid targets are planned. This talk will focus on Geant4 simulations for this campaign, with a focus on the setup, utilized targets and detectors.
Keywords: BBN; Deuterium; Geant4