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    ABSTRACT: The adsorption interactions of thallium and its compounds with gold and quartz surfaces were investigated. Carrier-free amounts of thallium were produced in nuclear fusion reactions of alpha particles with thick gold targets. The method chosen for the studies was gas thermochromatography and varying the redox potential of the carrier gases. It was observed that thallium is extremely sensitive to trace amounts of oxygen and water, and can even be oxidized by the hydroxyl groups located on the quartz surface. The experiments on a quartz surface with O-2, He, H-2 gas in addition with water revealed the formation and deposition of only one thallium species - TlOH. The adsorption enthalpy was determined to be Delta H-ads(SiO2)(TlOH) = -134 +/- 5 kJ mol(-1). A series of experiments using gold as stationary surface and different carrier gases resulted in the detection of two thallium species metallic Tl (H-2 as carrier gas) and TlOH (O-2, O-2 + H2O and H-2 + H2O as pure carrier gas or carrier gas mixture) with Delta H-ads(Au)(Tl) = -270 +/- 10 kJ mol(-1) and Delta H-ads(Au)(TlOH) = -146 +/- 3 kJ mol(-1). These data demonstrate a weak interaction of TlOH with both quartz and gold surfaces. The data represent important information for the design of future experiments with the heavier homologue of Tl in group 13 of the periodic table - element 113 (E113).
    07/2013; 101(7):421-426. DOI:10.1524/ract.2013.2045
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    ABSTRACT: Spectacular developments in relativistic quantum theory and computational algorithms in the last two decades allowed for accurate predictions of properties of the heaviest elements and their experimental behaviour. The most recent works in this area of investigations are overviewed. Preference is given to those related to experimental research. The role of relativistic effects is elucidated.
    Radiochimica Acta 07/2011; 99(7-8):459-476. DOI:10.1524/ract.2011.1855 · 1.41 Impact Factor
  • Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences 02/2015; 373(2037):20140191-20140191. DOI:10.1098/rsta.2014.0191 · 2.86 Impact Factor