Search for electromagnetic transitions between molecular states : results from the radiative capture channel

This paper discusses the characterization of the cluster nature of resonances in ¹²C+¹²C and ¹²C+¹⁶O by measuring their γ decay. Results from resonant radiative capture measurements in these systems are presented. Spin attributions as well as specificities of the decay pattern are described. For the ¹²C+¹²C system, identification of γ transitions within the molecular band are discussed as well as a new method to measure the eventual persistence of the resonant behaviour down to astrophysical energies