Conveners
Session 3 - Chemistry of radioelements and Super Heavy Elements research
- Heinz Gaeggeler (PSI, Switzerland)
- Matthias Schaedel (Japan Atomic Energy Agency, GSI, Germany)
Prof.
Andreas Türler
(Laboratory of Radiochemistry and Environmental Chemistry, Paul Scherrer Institute & Bern University, Switzerland)
18/09/2012, 08:00
Chemistry of radioelements and Super Heavy Elements research
Invited Lecture
With the recent synthesis of element 117, the 8th row of the Periodic Table of the Elements is complete. Also, the elements with atomic numbers 114 and 116 have now officially been named Flerovium and Livermorium by IUPAC. Significant progress has not only been achieved in synthesizing new elements, but also in their chemical characterization. In my contribution I will give an overview of the...
Prof.
Rolf-Dietmar Herzberg
(University of Liverpool, UK)
18/09/2012, 08:30
Chemistry of radioelements and Super Heavy Elements research
Invited Lecture
A growing number of experiments is currently opening up the transfermium region of nuclei for detailed spectroscopic investigations [1,2]. In the deformed nuclei in the nobelium region this allows an identification and mapping of single particle orbitals closest to the top end of the nuclear chart.
Initial in-beam measurements in the region focussed on γ-ray spectroscopy of even-even...
Prof.
Jens Volker Kratz
(Universität Mainz, Germany)
18/09/2012, 09:00
Chemistry of radioelements and Super Heavy Elements research
Invited Lecture
The unique role of the heaviest elements in chemical and physical sciences is discussed. With the actinide series (Z = 90 – 103) and the superactinide series (Z = 122 – 155), the heaviest elements have significantly shaped the architecture of the Periodic Table of the elements. Relativistic effects in the electron shells of the heaviest elements change the chemical properties in a given group...
169.
INVITED LECTURE - Vacuum thermochromatography - prospective method for heaviest element studies
Prof.
Ivo Zvara
(JINR Dubna, Russia)
18/09/2012, 09:30
Chemistry of radioelements and Super Heavy Elements research
Invited Lecture
The title technique for separating species with dissimilar adsorbability uses deeply evacuated columns with imposed negative longitudinal temperature gradient. Then the molecular flow, though convectionless, produces deposits peaking in individual temperature ranges. This fundamental mechanism - random walks from wall to wall - calls for rigorous Monte Carlo (MC) simulations, which require a...
Dr
Yuichiro Nagame
(Japan Atomic Energy Agency, Japan)
18/09/2012, 09:50
Chemistry of radioelements and Super Heavy Elements research
Invited Lecture
Chemical characterization of the heaviest elements in aqueous-phase experiments is performed by a partition method with single atoms, e.g., liquid-liquid extraction, ion-exchange chromatography, and reversed-phase extraction chromatography. In these processes, the behavior of the heaviest elements is compared with that of its lighter homologues under strictly identical conditions. Several...
Dr
Robert Eichler
(Paul Scherrer Institute,Switzerland)
18/09/2012, 10:10
Chemistry of radioelements and Super Heavy Elements research
Oral Communications
Sophisticated gas-phase chromatography experiments with superheavy elements Cn, E113, and Fl are performed using noble gas atmospheres as carrier gases with only trace amounts of oxygen and water mainly to ensure the elemental state. Surprisingly, during these experiments the gas phase transport of volatile species of Po and Bi have been observed. Their deposition behaviour on gold surfaces...
Dr
Nikolay Aksenov
(Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Russia)
18/09/2012, 10:25
Chemistry of radioelements and Super Heavy Elements research
Oral Communications
We conducted a new round of experiments to isolate and study chemical properties of 268Db, the end product of 288115 synthesized in a 48Ca + 243Am reaction. In contrast to previous experiments [1, 2] the reaction products passed through a gas filled recoil separator (DGFRS) and were stopped in a catcher (copper foil) which provided an additional separation from the actinides with a...
Prof.
Christoph Düllmann
(University of Mainz + GSI Darmstadt + Helmholtz Institute Mainz, Germany)
18/09/2012, 10:40
Chemistry of radioelements and Super Heavy Elements research
Oral Communications
The experimental determination of chemical properties of element 114 (E114) is among the hottest topics in superheavy element research. A first experiment reported E114 to be highly volatile, and to form weak physisorption bonds with Au surfaces [1]. However, the large uncertainties of the measured adsorption enthalpy covered a wide range in volatility, which prevented the experiment from...
Gilles Montavon
(Subatech, France)
18/09/2012, 10:55
Chemistry of radioelements and Super Heavy Elements research
Oral Communications
Astatine 211 is considered to be one of the most promising candidates for targeted alpha therapy (TAT)1, 2 and it is the subject of a wide research program in Nantes (France).
Very few data on the chemistry of astatine (At) are available. On the one hand, At is a rare element and it has only short half-life radioactive isotopes. On the other hand, it is an “invisible” element: the amount of...
Dr
Hiromitsu Haba
(RIKEN, Japan)
18/09/2012, 11:10
Chemistry of radioelements and Super Heavy Elements research
Oral Communications
Chemical characterization of superheavy elements (SHEs, atomic numbers Z ≥ 104) is an extremely interesting and challenging subject in modern nuclear and radiochemistry. We have been developing a gas-jet transport system coupled to the RIKEN gas-filled recoil ion separator GARIS as a novel technique for SHE chemistry. This system is a promising approach for exploring new frontiers in SHE...
