@article{8b1b0a1490a24df99fb4874280fa1852,
title = "Measurement of the first ionization potential of astatine by laser ionization spectroscopy",
abstract = "The radioactive element astatine exists only in trace amounts in nature. Its properties can therefore only be explored by study of the minute quantities of artificially produced isotopes or by performing theoretical calculations. One of the most important properties influencing the chemical behaviour is the energy required to remove one electron from the valence shell, referred to as the ionization potential. Here we use laser spectroscopy to probe the optical spectrum of astatine near the ionization threshold. The observed series of Rydberg states enabled the first determination of the ionization potential of the astatine atom, 9.31751(8) eV. New ab initio calculations are performed to support the experimental result. The measured value serves as a benchmark for quantum chemistry calculations of the properties of astatine as well as for the theoretical prediction of the ionization potential of superheavy element 117, the heaviest homologue of astatine.",
author = "S. Rothe and Andreyev, {A. N.} and S. Antalic and A. Borschevsky and L. Capponi and Cocolios, {T. E.} and {De Witte}, H. and E. Eliav and Fedorov, {D. V.} and Fedosseev, {V. N.} and Fink, {D. A.} and S. Fritzsche and L. Ghys and M. Huyse and N. Imai and U. Kaldor and Yuri Kudryavtsev and U. K{\"o}ster and Lane, {J. F.W.} and J. Lassen and V. Liberati and Lynch, {K. M.} and Marsh, {B. A.} and K. Nishio and D. Pauwels and V. Pershina and L. Popescu and Procter, {T. J.} and D. Radulov and S. Raeder and Rajabali, {M. M.} and E. Rapisarda and Rossel, {R. E.} and K. Sandhu and Seliverstov, {M. D.} and Sj{\"o}din, {A. M.} and {Van Den Bergh}, P. and {Van Duppen}, P. and M. Venhart and Y. Wakabayashi and Wendt, {K. D.A.}",
note = "Funding Information: We thank the ISOLDE Collaboration for flexible allocation of beam time. We acknowledge the support from TRIUMF, which receives federal funding via a contribution agreement with the National Research Council of Canada and support through an NSERC discovery grant, as well as beam time allocation for experiment S1237 at TRIUMF. We thank the GSI Target Group for manufacturing the carbon foils. We acknowledge support by the Wolfgang-Gentner-Programme of the Bundesminis-terium f{\"u}r Bildung und Forschung (BMBF, Germany), by FWO-Vlaanderen (Belgium), by GOA/2010/010 (BOF-KU Leuven), by the IUAP-Belgian Science Policy Office (BriX network P7/12), by a grant from the European Research Council (ERC-2011-AdG-291561-HELIOS), by the United Kingdom Science and Technology Facilities Council (STFC), by the European Union Seventh Framework through ENSAR (contract no. 262010), by the Slovak Research and Development Agency (contract No. APVV-0105-10 and APVV-0177-11) and by the Reimei Foundation of JAEA. We acknowledge the Knut and Alice Wallenberg Foundation (grant KAW 2005-0121) for funding the RILIS laser upgrade.",
year = "2013",
doi = "10.1038/ncomms2819",
language = "אנגלית",
volume = "4",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Research",
}