Lifetime measurements of excited states in neutron-rich $^{53}$Ti : Benchmarking effective shell-model interactions

Abstract : Level lifetimes of the yrast (5/2 −) to 13/2 − states in the neutron-rich nucleus 53 Ti, produced in a multinucleon-transfer reaction, have been measured for the first time. The recoil distance Doppler-shift method was employed and lifetimes of the excited states were extracted by a lineshape analysis aided by Geant4-based Monte-Carlo simulations. The experiment was performed at the Grand Accélérateur National d'Ions Lourds facility in Caen, France, by using the Advanced Gamma Tracking Array for the γ-ray detection coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification and the Cologne plunger for deep-inelastic reactions. Reduced transition probabilities, deduced from the lifetimes, give new information on the nuclear structure of 53 Ti, and are used to benchmark different shell-model calculations using established interactions in the fp shell.
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Submitted on : Tuesday, December 1, 2020 - 2:03:59 PM
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A. Goldkuhle, A. Blazhev, C. Fransen, A. Dewald, M. Beckers, et al.. Lifetime measurements of excited states in neutron-rich $^{53}$Ti : Benchmarking effective shell-model interactions. Physical Review C, American Physical Society, 2020, 102 (5), ⟨10.1103/PhysRevC.102.054334⟩. ⟨hal-03033556⟩

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