6533b7d6fe1ef96bd126683d
RESEARCH PRODUCT
First ionization potential of the heaviest actinide lawrencium, element 103
Sunao MiyashitaNozomi SatoPetra Thörle-pospiechChristoph E. DüllmannUzi KaldorKazuhiro OoeTetsuya SatoNorbert TrautmannThierry StoraKlaus EberhardtMasato AsaiJens Volker KratzKazuaki TsukadaAtsushi ToyoshimaEphraim EliavJ. RunkeShinichi IchikawaAkihiko OsaYuichiro NagameD. RenischAnastasia BorschevskyMatthias SchädelY. KaneyaY. Kaneyasubject
PhysicsPhysicsQC1-99905 social sciences050301 educationThermal ionizationchemistry.chemical_elementActinide010403 inorganic & nuclear chemistry01 natural sciences0104 chemical scienceschemistryNuclear Physics - TheoryAtomNuclear Physics - Experimentddc:530Atomic numberElectron configurationAtomic physicsIonization energyRelativistic quantum chemistry0503 educationLawrenciumdescription
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 IP 1 value is 4.9630.08 0.07 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]7s 2 5f 14 7p 1 1/2 , 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 |