Speaker
Description
The $^{12}$C/$^{16}$O abundance ratio is of prime importance to understand stellar evolution and energy generation in the universe. A tiny change in the abundance ratio can change an entire scenario of the stellar nucleosynthesis from carbon burning to the iron core in the last years of stellar life. Despite many experimental efforts in the last 50 years, none of the associated reactions like $^{12}$C+α→$^{16}$O+γ has yet been measured at the relevant stellar energies. Extrapolation from experimental data taken at higher energies can only help theoretical modeling of stellar evolution and nucleosynthesis. The COREA (Carbon Oxygen Reaction Experiment with Active-target TPC) is an experiment to measure the precise reaction rates with a novel detector system near stellar energies. We constructed a conduction-cooled superconducting magnet with a maximum field of 3 T. We tested the cooling performance and mapped out the field strengths over the AT-TPC volume. In addition, we studied the energy response of LaBr$_{3}$ detectors using an Am/$^{13}$C neutron source and a Ni disc in the energy region up to 10 MeV. Furthermore, Geant4 simulation was performed to study the performance of the AT-TPC with the superconducting magnet. We will present the development of the unique COREA detector system and the simulation results.
| Please select a main topic related to your abstract | Experimental Nuclear Physics for Astrophysics |
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