Laser-microwave spectroscopy of Cu I atoms in S, P, D, F and G Rydberg states

摘要

Energy-level positions of neutral copper atoms in S, P, D, F and G Rydberg series for principal quantum number n = 23-38 have been determined with sub-MHz accuracy by means of laser-microwave spectroscopy in the 73-321 GHz frequency range. Quantum defects of L = 0-4 levels and fine-structure splittings of P, D, F and G levels have been found from a global analysis of the measured frequencies of 79 single- and two-photon resonance transitions. Hyperfine multiplets were observable in several cases below n = 30 whose splitting frequencies are consistent with n~(-3) scaling from low-lying levels. An improved value of the Cu I ionization potential 62 317.46 ± 0.03 cm~(-1) has been obtained.