Speaker
Description
The beta decay of 8He was measured at IDS in 2022. 16% of decays populate excited states in 8Li which decay by neutron emission and alpha-neutron-triton breakup. Due to significant background the double alpha breakup of 8Be following the beta decay of 8Li, a triple coincidence must be made to identify alpha-neutron-triton events. Owing to the complexity of detecting neutrons, the response and acceptance of the setup and subsequent analysis is non-trivial and must be cleared up with simulations.
In this poster I will present how I have found the neutron detection response from GEANT4 simulations and tuned it to a 49K neutron-spectrum also acquired during the experiment. I will also show how this is used to estimate the alpha-neutron-triton coincidence efficiency, and correct the excitation spectrum in 8Li for these events.