Resonance ionization spectroscopy of high-lying 4sns and 4snd Rydberg levels of odd calcium isotopes
Yoshihiro Iwata, Masabumi Miyabe, Katsuaki Akaoka +2 more
Calcium Rydberg levels are of significant interest for efficient and isotope-selective resonance ionization of trace radionuclides such as calcium-41 ( 41 Ca). In this study, we report novel, to our knowledge, measurement data on the energy level shifts of 43 Ca for 4sns 1 S 0 and 4s(n−1)d 1 D 2 (n=40, 45, 50, 55, 60) Rydberg levels due to hyperfine-induced singlet–triplet mixing specific to isotopes with an odd mass number. Both 3 S 1 and 3 D J triplet signals corresponding to forbidden transitions were enhanced for 43 Ca at the high principal quantum numbers n=55 and 60, indicating a mixing of singlet components to some extent.
Journal of the Optical Society of America B•Nov 22, 2023•5 citations