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Resonant proton scattering in inverse kinematics using an active target and re-accelerated beams at NSCL/FRIB

Daniel Bazin (National Superconducting Cyclotron Laboratory, Michigan State University, USA)

14h30 GANIL room alpha

a coffee will be served 15mn before

 

The NSCL/FRIB laboratory at Michigan State University is conducting experiments using re-accelerated radioactive beams initially produced via projectile fragmentation. This unique scheme is able to provide a wide range of radioactive beams at energies close to the Coulomb barrier with low emittance and minimal dependence on the chemical properties of the ions. An experiment was performed using a 4.6 MeV/u Ar46 beam using the Active Target Time Projection Chamber (AT-TPC) to deduce spectroscopic factors in Ar47 via proton resonant scattering in inverse kinematics. This method long used on stable nuclei can now be applied efficiently to radioactive nuclei using active target gas detectors such as the AT-TPC. The details of the detector and the experiment will be presented, as well as the analysis methods used to extract the results from the data. The outcome of this first commissioning experiment is ushering a new program for the spectroscopy of nuclei far from stability. Looking ahead, the future beams of the FRIB facility presently under construction will greatly expand the reach of this type of experiment.

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