Post #12-Flerovium-289m=Ununtrium-288

Do any if you remember when element 114 was first synthesized, the assigned isotope 289 decayed with a 9.71 MeV alpha particle with a lifetime of 30.4 seconds, then its daughter decayed with an 8.67 MeV alpha particle with a lifetime of 15.4 minutes and so on? This decay chain seemed to be confirmed by https://e-reports-ext.llnl.gov/pdf/302186.pdf where the parent alpha decay was missed in the 248Cm+48Ca reaction, but nuclei with very similar decay properties were observed after this. The terminal spontaneous fission energies of both chains was 172 MeV and 174.43 MeV, with lifetimes of 16.5 minutes and 24.4 minutes, respectively. These are the same decay chain, but what is the exact identity of these nuclides? Many assign these decay chains to isomers of flerovium-289 and its decay daughters because subsequent experiments have observed a 2.6-second half-life for flerovium(element 114)-289, which is much shorter than the calculated half-life for the "flerovium-289m" of 1.1 minutes. However, I am skeptical that the decay chain of 2.6-second 289Fl has a parallel decay chain that does not interact with the main decay chain at all. I believe that the longer-lived decay chain belongs to ununtrium-288 and its daughters because alpha decay half-life trends of lighter isotopes of ununtrium, roentgenium, and meitnerium correlate very well with the observed half-lives. Also, my assignment of "hassium-277m" is bohrium-276, which falls in the fission corridor between neutron numbers 168 and 170 with 169 neutrons. The half-life of neighboring hassium-277 (ground state decay product of 2.6-second flerovium-289) is around 11 milliseconds, and an odd-proton hindrance factor and a lower proton number could produce the calculated half-life of 13.4 minutes for "hassium-277m" or bohrium-276. This decay chain from ununtrium-288 to bohrium-276 was observed from the single-proton and triple-neutron evaporation channel of both 244Pu+48Ca and 248Cm+48Ca.

The one argument that could disprove all of this is the expected yield from the single-proton, triple-neutron evaporation channels of 244Pu+48Ca and 248Cm+48Ca, which could be predicted to be very low compared to the standard neutron emission channels always observed. However, hybrid proton and neutron emission channels have been observed in more asymmetric hot fusion reactions, such as 248Cm(18O,p3n)262Lr and 249Cf(12C,p2n)258Lr, so such an evaporation channel is not impossible.

The possibilities of producing ununtrium-288 and its decay daughters would greatly contribute to the study of the Island of Stability. Ununtrium-288, being an odd-odd nucleus with a sufficiently long alpha half-life, could have a high branching ratio for positron emission, leading to copernicium-288, a long-lived fissioning nuclide. Roentgenium-284, the daughter of ununtrium-288, would also have a large positron emission branch to decay to a short-lived fissioning nuclide darmstadtium-284. If the 244Pu+48Ca and 248Cm+48Ca reactions are performed the same way that the decay chain was discovered previously, new neutron rich superheavy nuclides may be discovered.