Currently, the odd-Z nuclei with N-Z=56 to 60 have been synthesized by 48Ca-based hot fusion as follows.
N-Z=56: 237Np(48Ca, 3n) 282Uut
N-Z=57, 58: 243Am(48Ca, 3-4n) 287Uup, 288Uup
N-Z=59, 60: 249Bk(48Ca, 3-4n) 293Uus, 294Uus
The unknown the odd-Z transactinide decay chain with N-Z=54 and 55 would be synthesized by these ways with a cross-section of about 1pb. These decay chains will fill the “chain gap” between cold and hot fusions. If the α-decays of 264Db and 265Db are detected, the decay chains will be connected to the known nuclei 260Lr and 261Lr.
N-Z=54: 231Pa(48Ca, 3n) 276Rg
N-Z=55: 237Np(48Ca, 4n) 281Uut
Furthermore, the unknown neutron-rich odd-Z nuclei with N-Z=61 to 63 would be synthesized by the p4n to p2n channel as follows. The cross-sections of these reactions are expected to be about 100fb based on the cross-section ratio between the pxn and the xn channel of the 248Cm + 18O reactions. These neutron-rich decay chains will be terminated by the spontaneous fission of Bh and Mt nuclei around N=170, and these neutron-rich nuclei are located at near the β-stability line. It is noted no β-stable nuclei are known above Z=105 (Db).
N-Z=61, 62, 63: 248Cm(48Ca, pxn) 291-293Uup (x=2~4)