The electron affinity of astatine

David Leimbach, Jochen Ballof, Ferran Boix Pamies, Katerina Chrysalidis, Valentin N. Fedosseev, Ronald Fernando Garcia Ruiz, Camillo Granados, Karl Johnston, Bruce A Marsh, Annie Ringvall-Moberg, Ralf Erik Rossel, Shane Wilkins, Sebastian Rothe, Julia Karls, Lars bengtsson, Jessica Warbinek, Jakob Welander, Reinhard Heinke, Dominik Studer, Klaus D.A. WendtYangyang Guo, Anastasia Borschevsky, Ephraim Eliav, Pavel Molkanov, Dmitry Fedorov, Oliver Forstner, Nicolas Galland, Agota Koszorus, Moa K. Kristiansson, Yuan Liu, Lukas F. Pasteka, Mikael Reponen, Adam Vernon, João Pedro Fernandes Pinto Ramos

    Research outputpeer-review


    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
    Pages (from-to)1-9
    Number of pages9
    JournalNature Communications
    StatePublished - 30 Jul 2020

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