First ionization potential of the heaviest actinide lawrencium, element 103

Tetsuya K. Sato, Masato Asai, Anastasia Borschevsky, Thierry Stora, Nozomi Sato, Yusuke Kaneya, Kazuaki Tsukada, Christoph E. Düllmann, Klaus Eberhardt, Ephraim Eliav, Shinichi Ichikawa, Uzi Kaldor, Jens V. Kratz, Sunao Miyashita, Yuichiro Nagame, Kazuhiro Ooe, Akihiko Osa, Dennis Renisch, Jörg Runke, Matthias SchädelPetra Thörle-Pospiech, Atsushi Toyoshima, Norbert Trautmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The first ionization potential (IP1) of element 103, lawrencium (Lr), has been successfully determined for the first time by using a newly developed method based on a surface ionization process. The measured IP1 value is 4.9630..080.07 eV. This value is the smallest among those of actinide elements and is in excellent agreement with the value of 4.963(15) eV predicted by state-of-the-art relativistic calculations also performed in this work. Our results strongly support that the Lr atom has an electronic configuration of [Rn]7s25f 147p11/2, which is influenced by strong relativistic effects. The present work provides a reliable benchmark for theoretical calculations and also opens the way for studies on atomic properties of heavy elements with atomic number Z > 100. Moreover, the present achievement has triggered a controversy on the position of lutetium (Lu) and Lr in the Periodic Table of Elements.

Original languageEnglish
Title of host publicationNobel Symposium NS 160 - Chemistry and Physics of Heavy and Superheavy Elements
EditorsDirk Rudolph
PublisherEDP Sciences
ISBN (Electronic)9782759890118
DOIs
Publication statusPublished - Dec 1 2016
Event2016 Nobel Symposium NS 160 - Chemistry and Physics of Heavy and Superheavy Elements - Fjalkinge, Sweden
Duration: May 29 2016Jun 3 2016

Publication series

NameEPJ Web of Conferences
Volume131
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Other

Other2016 Nobel Symposium NS 160 - Chemistry and Physics of Heavy and Superheavy Elements
CountrySweden
CityFjalkinge
Period5/29/166/3/16

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Sato, T. K., Asai, M., Borschevsky, A., Stora, T., Sato, N., Kaneya, Y., ... Trautmann, N. (2016). First ionization potential of the heaviest actinide lawrencium, element 103. In D. Rudolph (Ed.), Nobel Symposium NS 160 - Chemistry and Physics of Heavy and Superheavy Elements [05001] (EPJ Web of Conferences; Vol. 131). EDP Sciences. https://doi.org/10.1051/epjconf/201613105001