The decay spectroscopy (DESPEC) project, led by the UK, focuses on measurements of radioactive decays from the most exotic nuclei in terms of N/Z ratio. These will be implanted in the position-sensitive silicon-detector array, AIDA, situated at the final focus of the Super-FRS.
Measurements of radioactive decays following β+, β–, α, proton, neutron and internal conversion emission in coincidence with discrete-line gamma-ray emissions will provide the first information on excited nuclear states in a wide range of isotopes at unprecedented N/Z ratios.
Measurements of β-decay half-lives, Q-values, decay heat, and neutron-emission probabilities of exotic neutron-rich nuclei are of major relevance to the rapid-neutron capture process (r process) path and are the major physics focus of this work package. The DESPEC detection system is modular, optimising setups for each individual experiment. In this current project, UK effort was focussed on the construction of the fast timing gamma-ray array using LaBr3(Ce) scintillation detectors (see picture right).
The tasks for this work package include the design, trial assembly in the UK, and in-situ commissioning at FAIR of these instruments.