Light particle-decaying nuclei investigated with the invariant-mass method

Tyler Webb (Hosted by Charity/Dickhoff), Washington University

The invariant-mass method is ideal for investigating particle decaying nuclei with short lifetimes. I will present invariant-mass measurements of particle decaying states in oxygen and nitrogen isotopes, with particular focus on two-proton decaying states in oxygen. Oxygen-12 is a known two-proton emitting nucleus, and we have observed a new 2p-decaying excited state. The momentum correlations between the decay fragments of 2p-decaying oxygen-12 states will be discussed, as they show an interesting evolution as the the energy of the decay increases. I will also present on the first experimental observation of the 2p-emitting oxygen-11, the mirror of the well-studied halo nucleus lithium-11.