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 KosterMoa K. Kristiansson, Yuan Liu, Bruce Marsh, Pavel Molkanov, Lukas F. Pasteka, Joao 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, Sebastian Rothe

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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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.

Original languageEnglish
Article number3824
Number of pages9
JournalNature Communications
Issue number1
Publication statusPublished - 30-Jul-2020



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