Orateur
Description
Since 2025, the INDRA-FAZIA collaboration launched a new scientific program at GANIL to explore the structure of light nuclei and astrophysical processes using direct reactions. A first experiment focused on measuring the matter radius of the carbon-12 Hoyle state via 12C+12C elastic and inelastic scattering at 105 MeV. Preliminary analysis confirms the excellent performance of FAZIA in missing-mass and invariant-mass studies, while INDRA’s scintillators demonstrated unexpected potential for gamma-ray detection.
Building on these results, a 2026 test experiment targeted the gamma decay width of the 3⁻ state in carbon-12 using (p,p’) reactions, with direct implications for the triple-alpha reaction rate in hot astrophysical environments. The setup’s unique capability to simultaneously probe multiple reaction channels, from exotic transfers (single nucleons, nucleon pairs, helium-3) to (p,alpha) and fusion reactions, enables comprehensive studies of direct reactions and light nuclei structure. A newly accepted alpha-transfer experiment will further investigate alpha-particle pre-formation probabilities in the skin of oxygen isotopes.
In this contribution, I will give an overview of the recent direct reaction campaign in D5 and discuss future plans, including the use of SPIRAL1’s radioactive ion beams and possible upgrades of FAZIA’s angular resolution to enhance invariant-mass performances.