New perspectives for studying nuclear collective states and exotic shapes with the EAGLE gamma spectrometer and the upgraded Recoil Filter Detector at HIL UW

Le résumé fourni par la source

The integration of the upgraded Recoil Filter Detector (RFD) with the EAGLE gamma-ray spectrometer at the Heavy Ion Laboratory, University of Warsaw, provides new opportunities for high-resolution in-beam spectroscopy. The modernization of the RFD aims to enhance performance under high-rate conditions by replacing traditional photomultiplier tubes with segmented silicon photomultiplier (SiPM) matrices and implementing a state-of-the-art FERS-5200 digital readout system. Dedicated Geant4 simulations of scintillation light distribution, induced by a 20 keV electron beam, demonstrate that individual SiPM elements operate independently, thereby improving the system’s counting-rate capability. These advancements will enable more accurate selection of evaporation residues, improved Doppler correction, and effective suppression of background contributions. The combined RFD–EAGLE-DIAMANT setup establishes a versatile experimental platform for exploring nuclear collective excitations, superdeformation, shape transitions, and the spectroscopy of heavy and exotic nuclei produced with very low cross sections.

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