Feasibility Studies for Measuring the Astrophysical S-Factor of the Reaction ¹²C(α,γ)¹⁶O via Electro-Disintegration at MAGIX

The nucleosynthesis reaction ¹²C(α,γ)¹⁶O is of utmost importance in nuclear astrophysics. The S-factor of this reaction is a major parameter for determining the abundance ratio of oxygen to carbon in stellar nucleosynthesis, which in turn plays a crucial role in understanding pre-supernova evolution. Since the cross section of the reaction ¹²C(α,γ)¹⁶O is low, a high-precision low-energy experiment with a high luminosity is required to measure the S-factor. One such experiment that aims at measuring this important and challenging quantity is MAGIX.

MAGIX is a versatile fixed-target experiment, which will be commissioned at the upcomming electron accelerator MESA in Mainz, Germany. A measurement is planned to investigate the cross section of the electro-disintegration reaction ¹⁶O(e,e'α)¹²C. With this method, it will be possible to determine the S-factor of the ground state transitions of the reaction ¹²C(α,γ)¹⁶O.

In this talk an overview of the S-Factor will be given as well as the planned experimental setup of the electro-disintegration measurements at MAGIX. Finally, the results of the current simulations are discussed, especially the parameter range that MAGIX can access.