Multichannel-quantum-defect theory wave functions of Ba tested or improved by laser measurements

摘要: Considerable efforts have been made recently to understand the detailed structure and properties of high Rydberg states bound even-parity spectrum Ba. Interest in Ba is motived by ability study interacting series. The perturbations 6snl series 5d7d levels are reflected not only level but also various observable quantities investigated high-resolution laser spectroscopy. A wealth data has obtained on lifetimes, isotopes shifts, Lande factors, hyperfine structures, photoelectron angular distributions, etc. Previously multichannel-quantum-defect theory (MQDT) permitted one successfully interpret energies perturbed new possibilities offered spectroscopy analyze state mixing provided an opportunity probe MQDT wave functions. This paper shows how different measurements complement another check or even extend models derived from energies. Various examples concerning 6sns 6snd presented. For 6snd1,3D2 series, insufficient get full parameters needed determine functions, gJ-factor hyperfine-structure essential improve