In two recent papers by Pore et al. and Khuyagbaatar et al., discovery of the new isotope ${}^{244}\mathrm{Md}$ was reported. The decay data, however, are conflicting. While Pore et al. report two isomeric states decaying by $\alpha$ emission with $E_{\alpha }(1)=8.66(2)\mathrm{MeV}$, $T_{1/2}(1)={0.4}_{-0.1}^{+0.4}\mathrm{s}$ and $E_{\alpha }(2)=8.31(2)\mathrm{MeV}$, $T_{1/2}(2)\approx 6\mathrm{s}$, Khuyagbaatar et al. [Phys. Rev. Lett. 125, 142504 (2020).] report only a single transition with a broad energy distribution of $E_{\alpha }=(8.73–8.86)\mathrm{MeV}$ and $T_{1/2}={0.30}_{-0.09}^{+0.19}\mathrm{s}$. The data published in Pore et al. are very similar to those published for ${}^{245m}\mathrm{Md}$ [$E_{\alpha }=8.64(2)$, 8.68(2) MeV, $T_{1/2}={0.35}_{-0.16}^{+0.23}\mathrm{s}$ [V. Ninov, F. P. Heßberger, S. Hofmann, H. Folger, G. Münzenberg, P. Armbruster, A. V. Yeremin, A. G. Popeko, M. Leino, and S. Saro, Z. Phys. A 356, 11 (1996).] ]. Therefore, we compare the data presented for ${}^{244}\mathrm{Md}$ in Pore et al. with those reported for ${}^{245}\mathrm{Md}$ in Ninov et al. and also in Khuyagbaatar et al. We conclude that the data presented in Pore et al. shall be attributed to ${}^{245}\mathrm{Md}$ with small contributions (one event each) from ${}^{245}\mathrm{Fm}$ and probably ${}^{246}\mathrm{Md}$.

中文翻译：

---

关于发现Md244的一些评论

在Pore等人最近发表的两篇论文中。和Khuyagbaatar等。，发现新同位素${}^{244}d$已经报道。但是，衰减数据存在冲突。而毛孔等。报告两个同分异构态衰减$\alpha$ 发射与 ${Ë}_{\alpha }（\mathrm{1个}）=8.66（\mathrm{2个}）\mathrm{电动汽车}$， ${Ť}_{\mathrm{1个}/\mathrm{2个}}（\mathrm{1个}）={0.4}_{-0.1}^{+0.4}\mathrm{s}$ 和 ${Ë}_{\alpha }（\mathrm{2个}）=8.31（\mathrm{2个}）\mathrm{电动汽车}$， ${Ť}_{\mathrm{1个}/\mathrm{2个}}（\mathrm{2个}）\approx 6\mathrm{s}$，Khuyagbaatar等。[物理 莱特牧师 [ 125，142504（2020）。]报告了仅一次过渡，能量分布宽广，${Ë}_{\alpha }=（8.73–8.86）\mathrm{电动汽车}$ 和 ${Ť}_{\mathrm{1个}/\mathrm{2个}}={0.30}_{-0.09}^{+0.19}\mathrm{s}$。数据发表在Pore等人的文章中。与针对以下内容发布的内容非常相似${}^{245米}d$ [${Ë}_{\alpha }=8.64（\mathrm{2个}）$，8.68（2）MeV， ${Ť}_{\mathrm{1个}/\mathrm{2个}}={0.35}_{-0.16}^{+0.23}\mathrm{s}$[V. Ninov，F。P.Heßberger，S。Hofmann，H。Folger，G。Münzenberg，P。Armbruster，A。V. Yeremin，A。G. Popeko，M。Leino，和S. Saro，Z。Phys 。A 356，11（1996）。]。因此，我们比较呈现的数据${}^{244}d$在Pore等人中。与那些报告${}^{245}d$在Ninov等人中。以及Khuyagbaatar等人。我们得出的结论是，Pore等人提出的数据。应归因于${}^{245}d$ 贡献很小（每个事件一个） ${}^{245}\mathrm{调频}$ 而且可能 ${}^{246}d$。