The electron affinity of astatine

David Leimbach (), Julia Karls, Yangyang Guo, Rizwan Ahmed, Jochen Ballof, Lars Bengtsson, Ferran Boix Pamies, Anastasia Borschevsky, Katerina Chrysalidis, Ephraim Eliav, Dmitry Fedorov, Valentin Fedosseev, Oliver Forstner, Nicolas Galland, Ronald Fernando Garcia Ruiz, Camilo Granados, Reinhard Heinke, Karl Johnston, Agota Koszorus, Ulli Köster, Moa K. Kristiansson, Yuan Liu, Bruce Marsh, Pavel Molkanov, Lukáš F. Pašteka, João Pedro Ramos, Eric Renault, Mikael Reponen, Annie Ringvall-Moberg, Ralf Erik Rossel, Dominik Studer, Adam Vernon, Jessica Warbinek, Jakob Welander, Klaus Wendt, Shane Wilkins, Dag Hanstorp and Sebastian Rothe
Additional contact information
David Leimbach: CERN
Julia Karls: University of Gothenburg
Yangyang Guo: University of Groningen
Rizwan Ahmed: National Centre for Physics (NCP)
Jochen Ballof: CERN
Lars Bengtsson: University of Gothenburg
Ferran Boix Pamies: CERN
Anastasia Borschevsky: University of Groningen
Katerina Chrysalidis: CERN
Ephraim Eliav: Tel Aviv University
Dmitry Fedorov: Petersburg Nuclear Physics Institute - NRC KI
Valentin Fedosseev: CERN
Oliver Forstner: Friedrich-Schiller-Universität Jena
Nicolas Galland: Université de Nantes, CNRS
Ronald Fernando Garcia Ruiz: CERN
Camilo Granados: CERN
Reinhard Heinke: Johannes Gutenberg-Universität
Karl Johnston: CERN
Agota Koszorus: KU Leuven, Instituut voor Kern- en Stralingsfysica
Ulli Köster: Institut Laue-Langevin
Moa K. Kristiansson: Stockholm University
Yuan Liu: Oak Ridge National Laboratory
Bruce Marsh: CERN
Pavel Molkanov: Petersburg Nuclear Physics Institute - NRC KI
Lukáš F. Pašteka: Faculty of Natural Sciences, Comenius University
João Pedro Ramos: SCK CEN, Research Centre Mol
Eric Renault: Université de Nantes, CNRS
Mikael Reponen: University of Jyväskylä
Annie Ringvall-Moberg: CERN
Ralf Erik Rossel: CERN
Dominik Studer: Johannes Gutenberg-Universität
Adam Vernon: The University of Manchester
Jessica Warbinek: University of Gothenburg
Jakob Welander: University of Gothenburg
Klaus Wendt: Johannes Gutenberg-Universität
Shane Wilkins: CERN
Dag Hanstorp: University of Gothenburg
Sebastian Rothe: CERN

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract One of the most important properties influencing the chemical behavior of an element is the electron affinity (EA). Among the remaining elements with unknown EA is astatine, where one of its isotopes, 211At, is remarkably well suited for targeted radionuclide therapy of cancer. With the At− anion being involved in many aspects of current astatine labeling protocols, the knowledge of the electron affinity of this element is of prime importance. Here we report the measured value of the EA of astatine to be 2.41578(7) eV. This result is compared to state-of-the-art relativistic quantum mechanical calculations that incorporate both the Breit and the quantum electrodynamics (QED) corrections and the electron–electron correlation effects on the highest level that can be currently achieved for many-electron systems. The developed technique of laser-photodetachment spectroscopy of radioisotopes opens the path for future EA measurements of other radioelements such as polonium, and eventually super-heavy elements.

Date: 2020
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DOI: 10.1038/s41467-020-17599-2

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