Abstract
Rydberg states of atoms with two valence electrons exhibit three markedly different features compared to alkali systems. First of all, the coupling between the two valence electrons is most crucial for the properties of the Rydberg states and, in general, we have to distinguish between series with predominant singlet or triplet character. Secondly, low-lying states of doubly excited configurations cause strong perturbations of the Rydberg series belonging to one excited valence electron. This can lead to both singlet-triplet mixing and/or configuration mixing more or less local in energy. The third feature involves the interaction between the ms valence electron of the ion and the nucleus. The electro-static part of it reveals itself through the field shift, while for nuclei with I=0 the magnetic interaction causes a hyperfine splitting as well as a higher-order shift.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
