New spectroscopic information on Tl211,213 : A changing structure beyond the N=126 shell closure

The neutron-rich isotopes ^{211,213}\mathrm{Tl} beyond the N=126shell closure, have been studied for the first time in isomer \ensuremath{\gamma}ray decay, exploiting the fragmentation of a primary uranium beam at the Fragment Separator-Rare Isotopes Investigation at GSI setup. The observed isomeric states in ^{211,213}\mathrm{Tl}show a deviation from the seniority-like scheme of ^{209}\mathrm{Tl} The possible interpretation of...