First ionization potential measurements of heavy actinides, lawrencium and nobelium

Sato, Tetsuya

no journal, , 

The experimental determination of the first ionization potential (IP) yields information on the electronic structure of the element. We successfully ionized and mass-separated No and Lr with efficiencies () of (0.5 0.1)% and (36 7)% at 2800 K, respectively. From these values, IP values of No and Lr were determined based on the relationship between and IP. Our values are in good agreement with the predicted ones by theoretical calculations.