2022-09-29 ｱﾒﾘｶ・ﾛｰﾚﾝｽﾘﾊﾞﾓｱ国立研究所(LLNL)
今回の実験では、線形加速器で毎秒4兆個のカルシウム48イオンを光速の10％まで加速し、プルトニウム244を含む標的に発射したところ、1日に数個のフレロビウム原子が生成された。
ラドンは、室温では金検出器の最初の部分を飛び越え、最低温度では部分的にしか保持されないことさえある。フレロビウムの結果は、この挙動と比較することができた。
その結果、フレロビウム種と金表面との相互作用が2種類観察された。室温での金への析出は、希ガスでは起こらない比較的強い化学結合が形成されたことを示している。
＜関連情報＞
- https://www.llnl.gov/news/its-metal-not-gas-flerovium-chemical-properties-unveiled
- https://www.frontiersin.org/articles/10.3389/fchem.2022.976635/full
114番元素、フレロビウムの吸着と反応性に関して
On the adsorption and reactivity of element 114, flerovium
A. Yakushev, L. Lens, Ch. E. Düllmann, J. Khuyagbaatar, E. Jäger, J. Krier, J. Runke, H. M. Albers, M. Asai, M. Block, J. Despotopulos, A. Di Nitto, K. Eberhard, U. Forsberg, P. Golubev, M. Götz, S. Götz, H. Haba, L. Harkness-Brennan, R.-D. Herzberg, F. P. Heßberger, D. Hinde, A. Hübner, D. Judson, B. Kindler, Y. Komori, J. Konki, J.V. Kratz, N. Kurz, M. Laatiaoui, S. Lahiri, B. Lommel, M. Maiti, A. K. Mistry, Ch. Mokry, K. J. Moody, Y. Nagame, J. P. Omtvedt, P. Papadakis, V. Pershina, D. Rudolph, L.G. Samiento, T.K. Sato, M. Schädel, P. Scharrer, B. Schausten, D. A. Shaughnessy, J. Steiner, P. Thörle-Pospiech, A. Toyoshima, N. Trautmann, K. Tsukada, J. Uusitalo, K.-O. Voss, A. Ward, M. Wegrzecki, N. Wiehl, E. Williams and V. Yakusheva
Frontiers in Chemistry Published:25 August 2022
DOI:https://doi.org/10.3389/fchem.2022.976635
Flerovium (Fl, element 114) is the heaviest element chemically studied so far. To date, its interaction with gold was investigated in two gas-solid chromatography experiments, which reported two different types of interaction, however, each based on the level of a few registered atoms only. Whereas noble-gas-like properties were suggested from the first experiment, the second one pointed at a volatile-metal-like character. Here, we present further experimental data on adsorption studies of Fl on silicon oxide and gold surfaces, accounting for the inhomogeneous nature of the surface, as it was used in the experiment and analyzed as part of the reported studies. We confirm that Fl is highly volatile and the least reactive member of group 14. Our experimental observations suggest that Fl exhibits lower reactivity towards Au than the volatile metal Hg, but higher reactivity than the noble gas Rn.
