Reaction Channel selection techniques and γ – γ fast-timing spectroscopy using the ν-Ball Spectrometer

The reaction of a pulsed ¹⁸O beam on a self-supporting and gold-backed isotopically-enriched ¹⁶⁴Dy target of thickness 6.3 mg/cm² at separate primary beam energies of 71, 76 and 80 MeV was studied at the accelerator at the ALTO facility of the IPN Orsay. The γ rays produced were detected using the newly-constructed ν-Ball spectrometer which comprised of HPGe and LaBr₃(Ce) detectors. This conference paper describes the methodology and effectiveness of multiplicity/sum-energy gating, for channel selection between fusion evaporation events and lower multiplicity/energy events from inelastic nuclear scattering and Coulomb excitation of the target, and from two-neutron transfer reactions to ¹⁶⁶Dy.