Speaker
Description
By 2023 a totality of 3337 nuclides have been discovered by mankind [1] of which 445 have been discovered at GSI in its various experimental areas (FRS, SHIP, TASCA, Online Mass Separator etc..) which ranks it as a second place in worldwide discoveries. Continuing this tradition, we report in this paper of an experiment performed at the GSI in FAIR Phase-0 where new isotopes were identified with the FRagment Separator [2] using an high intensity, high duty cycle 208Pb beam fragmentation on a beryllium target. The experiment, part of the scientific program of the Super-FRS Experimental collaboration [3], focused in the neutron rich region between terbium and rhenium, close to the N=126 line. This region is of particular interest for the NUSTAR collaboration [4] and close to the third waiting point of the r-process. As such, we used the reported experiment as a benchmark for the production of heavy ions in this region for further studies during the FAIR phase 0 NUSTAR program.
This paper will present current results of the experiment and mention last development on new isotope search during the phase 0 program of FAIR as well as presenting the possibility the new Super-FRS facility will enable starting from 2028.
[1] Discovery of Nuclides Project: https://people.nscl.msu.edu/~thoennes/isotopes/
[2] H. Geissel et al., Nucl. Inst. Meth. B 70, 286 (1992)
[3] J. Äystö et al. Nucl. Inst. Meth. Phys. Res. B 376, 111 (2016)
[4] N. Kalantar-Nayestanaki, A. Bruce, Nucl. Phys. News, 28, 5 (2018)
[5] W. R. Plaß et al., Nucl. Inst. Meth. Phys. Res. B. 317, 457 (2013)
[6] R. Kummar et al. Nucl. Inst. Meth. Phys. Res. A. 598, 754 (2008)