Speaker
Description
The very/super-heavy nuclei area is a unique laboratory in the nuclear chart for the fundamental study of the atomic nucleus since excitation and decay modes are governed by the competition between the short-range strong nuclear interaction, long-range Coulomb repulsion, surface effects and the properties of individual quasiparticle states. For such studies, a wide scientific program has been launched at the FLNR Dubna laboratory with the emergence of new experimental setups such as the SHELS separator [1] and its focal plane detection system, GABRIELA [2] . Thanks to the high α, γ and ICE efficiency detection, some really new results on nobelium isotopes will be presented. Namely, the first γ and ICE spectroscopy of the $^{256}$No nucleus [3] and the revisiting of the $^{254}$No level scheme with an indication of a possible shape coexistence/superdeformed state.
[1] Popeko, A. G. et al. Separator for Heavy ELement Spectroscopy - velocity filter SHELS. Nucl. Instrum. Methods Phys. Res. B 376, 140-143, doi:10.1016/j.nimb.2016.03.045 (2016).
[2] Hauschild, K. et al. GABRIELA: A new detector array for gamma-ray and conversion electron spectroscopy of transfermium elements. Nucl. Instrum. Methods 560, 388-394 (2006).
[3] Kessaci, K. et al. Evidence of high-$K$ isomerism in $_{102}^{256}$No$_{154}$. Phys. Rev. C 104, 044609, doi:10.1103/PhysRevC.104.044609 (2021).
