“…Consequently, we estimate a lower limit of the 255 No m3 excitation energy as 1500 keV being the sum of the (15/2 + , 17/2 + ) level excitation energy 1150-1300 keV and the 355-keV transition. We denote 255 No m3 as a 3-qp K isomer based on its excitation energy, similar to known K-isomeric states in neighboring isotopes with E * > 1000 keV (see, e.g., [28,36,39,40]). 255 No m3 populates the (15/2 + , 17/2 + ) level or members of its rotational band with a half-life of 1.2 +0.6 −0.4 μs.…”