Broad resonances in light nuclei studied with β- and γ-spectroscopy

Recent work on broad nuclear resonances in ¹²C are discussed. An attempt is made to formulate pressing currently open questions, which should be addressed in future studies. A new method for identifying and studying broad resonances is presented, and first results discussed. The idea of this method is that the initial state can be chosen such that the spin-parity of the state and the selection rules of γ-decay predominantly populate the state(s) of interest. We identify these γ-transitions by measuring the α-decay of the final states after the γ-decay in complete kinematics such that the final state energy can be determined from the α-particles instead of the intermediate γ-ray. This method was applied to the 1⁺ states at 12.7 MeV and 15.1 MeV populated in the reaction ¹⁰B(³He,p)¹²C and also to the 2⁺ state at 16.11 MeV which we populated through the reaction ¹¹B(p,¹²C*)