Abstract
Several facilities or apparatus for the synthesis and spectroscopy of the Super-Heavy Nuclei (SHN) are presently under construction in the world, which reflect the large interest for this region of extreme mass and charge, but also for the need of even more advanced research infrastructures. Among this new generation, the GANIL/SPIRAL2 facility in Caen, France, will soon deliver very high intense ion beams of several tens of particle μ A. The Super Separator Spectrometer S3 has been designed to exploit these new beams for the study of SHN after separation. It will provide the needed beam rejection, mass selection and full arsenal of state-of-the art detection setups. Still at GANIL, the AGATA new generation gamma-ray tracking array is being operated. The VAMOS high acceptance spectrometer is being upgraded as a gas-filled separator. Its coupling with AGATA will lower the spectroscopic limits for the prompt gamma-ray studies of heavy and super-heavy nuclei. In this proceeding, these new devices will be presented along with a selected physics case.
Highlights
IntroductionProgress and success in the field will be obtained by lowering the cross-section limits to reach heavier nuclei in the direction of the island of stability, and by performing detailed studies
The synthesis of new elements has reached up to Z = 118 with the IUPAC/IUPAP recently assigning the naming rights for the elements 113, 115, 117 and 118 to groups at the FLNR Dubna, Russia and at RIKEN, Japan [1,2,3,4]
The production crosssections of the heaviest known nuclei are extremely low, at the pb level in the Z = 114 − 118 region, which corresponds with present state-of-the-art facilities to the synthesis of a few atoms per month
Summary
Progress and success in the field will be obtained by lowering the cross-section limits to reach heavier nuclei in the direction of the island of stability, and by performing detailed studies This will be done improving experimental means like new high intensity ion accelerators, efficient in-flight separators and spectrometers, and highly efficient detector systems with fast electronics. Provided the atomic scheme is known or measured, laser ionisation can selectively send the nuclei of interest (or their isomers) to a low energy line Their mass can be measured with high precision with a multi-reflection time-of-flight spectrometer [12]. In a latter phase expected in 2023, the option to send the ions in the DESIR hall [13] will be available for ground state and atomic properties studies: mass measurement, decay studies, collinear laser spectroscopy, etc. S3 is designed for SHN, but for other regions where mass selection and/or tagging is needed for the spectroscopy and synthesis of rare nuclei, which corresponds to a large panel of isotopes from N ∼ Z nuclei up to the heaviest nuclei
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