Microwave spectroscopy of the calcium 4snf → 4s(n + 1)d, 4sng, 4snh, 4sni, and 4snk transitions

Abstract

© 2015 American Physical Society. We observe the microwave transitions of calcium from the 4snf states to the 4s(n + 1)d, 4sng, 4snh, 4sni, and 4snk states for 18 ≤ n ≤ 23 using delayed field ionization as the state selective detection technique. The observed intervals between the ℓ ≥ 5 states can be analyzed to extract the Ca⁺ ionic dipole (α<inf>d</inf>) and quadrupole (α<inf>q</inf>) polarizabilities using two nonadiabatic core polarization models. Using these two models we determine the ionic dipole and quadrupole polarizabilities to be 75.3a<inf>0</inf>³ < α<inf>d</inf> < 76.9a<inf>0</inf>³ and 206a<inf>0</inf>⁵ < α<inf>q</inf> < 1590a<inf>0</inf>⁵, respectively.