Vacuum Chromatography of Tl on SiO2 at the Single-Atom Level

Patrick Steinegger, Masato Asai, Rugard Dressler, Robert Eichler, Yusuke Kaneya, Akina Mitsukai, Yuichiro Nagame, Dave Piguet, Tetsuya K. Sato, Matthias Schädel, Shinsaku Takeda, Atsushi Toyoshima, Kazuaki Tsukada, Andreas Türler, Alessio Vascon

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)


An isothermal vacuum chromatography setup for superheavy element chemistry studies was developed and tested online at the one-atom-at-a-time level. As a model system, the adsorption behavior of thallium on quartz was chosen with respect to a future chemical characterization of its superheavy homologue, element 113 (E113, Z = 113), using the described setup. Short-lived 184Tl (t1/2 = 10.1(5) s) was produced in the reaction 152Gd(35Cl, 3n)184Tl and delivered as a mass-separated ion beam to the chemistry experiment: A subsurface implantation and a subsequent fast thermal release from a metal matrix was followed by isothermal vacuum chromatography as the chemical separation stage. Single atomic species passing this chromatographic separation were finally identified by time- and energy-resolved event-by-event α-spectroscopy using a diamond-based solid-state detector. The derived adsorption enthalpy of -ΔHadsSiO2(Tl) = 158 ± 3 kJ·mol-1 significantly exceeds available data but correlates well with the adsorption of other elements studied on the same surface. The described technique enables chemical experiments with short-lived transactinide elements (t1/2 < 1 s), surpassing the rapidity of today's state-of-the-art gas-phase experiments by at least 1 order of magnitude. (Figure Presented).

ジャーナルJournal of Physical Chemistry C
出版ステータス出版済み - 4 7 2016

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜


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