Some Remarks on the Discovery of 244Md

In two recent papers by Pore et al. and Khuyagbaatar et al., discovery of the new isotope Md244 was reported. The decay data, however, are conflicting. While Pore et al. report two isomeric states decaying by α emission with Eα(1)=8.66(2) MeV, T1/2(1)=0.4-0.1+0.4 s and Eα(2)=8.31(2) MeV, T1/2(2)≈6 s, Khuyagbaatar et al. [Phys. Rev. Lett. 125, 142504 (2020).PRLTAO0031-900710.1103/PhysRevLett.125.142504] report only a single transition with a broad energy distribution of Eα=(8.73-8.86) MeV and T1/2=0.30-0.09+0.19 s. The data published in Pore et al. are very similar to those published for Md245m [Eα=8.64(2), 8.68(2) MeV, T1/2=0.35-0.16+0.23 s [V. Ninov, F. P. Heßberger, S. Hofmann, H. Folger,…