C. J. Sansonetti and K. L. Andrew, "Improved determinations of the n ^{2}D and n ^{2}F fine-structure intervals in neutral cesium," Phys. Rev. A 22, 1370–1374 (1980).

K. A. Safinya, T. F. Gallagher, and W. Sandner, "Resonance measurements of ƒ-h and ƒ-i intervals in cesium using selective and delayed field ionization," Phys. Rev. A 22, 2672–2678 (1980).

E. J. Kelsey and L. Spruch, "Retardation effects on high Rydberg states: a retarded *R*^{-5} polarization potential," Phys. Rev. A 18, 15–25 (1978).

H. Coker, "Empirical free-ion polarizabilities of the alkali metal, alkaline earth metal, and halide ions," J. Phys. Chem. 80, 2078–2084 (1976).

R. R. Freeman and D. Kleppner, "Core polarization and quantum defects in high-angular-momentum states of alkali atoms," Phys. Rev. A 14, 1614–1619 (1976).

C. B. Ross, D. R. Wood, and P. S. Scholl, "Series limit and hydrogen like series in Pb II," J. Opt. Soc. Am. 66, 36–39 (1976).

R. D. Cowan and D. C. Griffin, "Approximate relativistic corrections to atomic radial wavefunctions," J. Opt. Soc. Am. 66, 1010–1014 (1976).

K. Bockasten, "Mean values of powers of the radius for hydrogpnic electron orbits," Phys. Rev. A 9, 1087–1089 (1974).

R. D. Cowan and J. B. Mann, "Stabilization of solution of the Hartree-Fock equations," J. Comput. Phys. 16, 160–166 (1974).

D. C. Griffin, R. D. Cowan, and K. L. Andrew, "Instabilities in the iterative solution of the Hartree-Fock equations for excited electrons," Phys. Rev. A 3, 1233–1242 (1971).

U. Litzén, "The 5*g* levels of the alkali metals," Phys. Scr. 1, 253–255 (1970).

K. B. S. Eriksson and I. Wenåker, "New wavelength measurements in Cs I," Phys. Scr. 1, 21–24 (1970).

H. Eissa and U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: I. A correction to the adiabatic approximation," Proc. Phys. Soc. London 92, 556–565 (1967).

U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: II. Evaluation of the polarizabilities from observed spectra," Proc. Phys. Soc. London 92, 566–576 (1967).

K. B. Eriksson, I. Johansson, and G. Norlén, "Precision wavelength measurements connecting the Cs I 6*s*, 6*p*, and 6*d* levels, with a study of the correction for phase change in infrared interferometry," Ark. Fys. 28, 233–238 (1964).

A. Fröman, J. Linderberg, and Y. Öhrn, "Penetration effe. in the ^{2}*F*-series of Cs I," J. Opt. Soc. Am. 54, 1064–1065 (1964).

K. Bockasten, "Polarization formula for the ^{2}*F*-series of Cs I," J. Opt. Soc. Am. 54, 1065 (1964).

K. Bockasten, "A study of C IV: term values, series formulae, and Stark effect," Ark. Fys. 10, 567–582 (1956).

P. Risberg, "A revision of the term systems for Na I and K I based on hollow cathode observations," Ark. Fys. 10, 583–606 (1956).

K. Bockasten, "Polarizability of Mg^{+2} derived from hydrogen-like terms of Mg II," Phys. Rev. 102, 729–730 (1956).

J. R. Tessman, A. H. Kahn, and W. Shockley, "Electronic polarizabilities of ions in crystals," Phys. Rev. 92, 890–895 (1953).

J. E. Mayer and M. G. Mayer, "The polarizabilities of ions from spectra," Phys. Rev. 43, 605–611 (1933).

M. Born and W. Heisenberg, "Über den Einfluss der Deformierbarkeit der lonen auf optische und chemische Konstanten," Z. Phys. 23, 388–410 (1924).

C. J. Sansonetti and K. L. Andrew, "Improved determinations of the n ^{2}D and n ^{2}F fine-structure intervals in neutral cesium," Phys. Rev. A 22, 1370–1374 (1980).

D. C. Griffin, R. D. Cowan, and K. L. Andrew, "Instabilities in the iterative solution of the Hartree-Fock equations for excited electrons," Phys. Rev. A 3, 1233–1242 (1971).

K. Bockasten, "Mean values of powers of the radius for hydrogpnic electron orbits," Phys. Rev. A 9, 1087–1089 (1974).

K. Bockasten, "Polarization formula for the ^{2}*F*-series of Cs I," J. Opt. Soc. Am. 54, 1065 (1964).

K. Bockasten, "A study of C IV: term values, series formulae, and Stark effect," Ark. Fys. 10, 567–582 (1956).

K. Bockasten, "Polarizability of Mg^{+2} derived from hydrogen-like terms of Mg II," Phys. Rev. 102, 729–730 (1956).

M. Born and W. Heisenberg, "Über den Einfluss der Deformierbarkeit der lonen auf optische und chemische Konstanten," Z. Phys. 23, 388–410 (1924).

H. Coker, "Empirical free-ion polarizabilities of the alkali metal, alkaline earth metal, and halide ions," J. Phys. Chem. 80, 2078–2084 (1976).

R. D. Cowan and D. C. Griffin, "Approximate relativistic corrections to atomic radial wavefunctions," J. Opt. Soc. Am. 66, 1010–1014 (1976).

R. D. Cowan and J. B. Mann, "Stabilization of solution of the Hartree-Fock equations," J. Comput. Phys. 16, 160–166 (1974).

D. C. Griffin, R. D. Cowan, and K. L. Andrew, "Instabilities in the iterative solution of the Hartree-Fock equations for excited electrons," Phys. Rev. A 3, 1233–1242 (1971).

B. Edlén, "Atomic spectra," in Handbuch der Physik, S. Flügge, ed. (Springer-Verlag, Berlin, 1964), Vol. XXVII.

H. Eissa and U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: I. A correction to the adiabatic approximation," Proc. Phys. Soc. London 92, 556–565 (1967).

K. B. Eriksson, I. Johansson, and G. Norlén, "Precision wavelength measurements connecting the Cs I 6*s*, 6*p*, and 6*d* levels, with a study of the correction for phase change in infrared interferometry," Ark. Fys. 28, 233–238 (1964).

K. B. S. Eriksson and I. Wenåker, "New wavelength measurements in Cs I," Phys. Scr. 1, 21–24 (1970).

R. R. Freeman and D. Kleppner, "Core polarization and quantum defects in high-angular-momentum states of alkali atoms," Phys. Rev. A 14, 1614–1619 (1976).

K. A. Safinya, T. F. Gallagher, and W. Sandner, "Resonance measurements of ƒ-h and ƒ-i intervals in cesium using selective and delayed field ionization," Phys. Rev. A 22, 2672–2678 (1980).

M. Born and W. Heisenberg, "Über den Einfluss der Deformierbarkeit der lonen auf optische und chemische Konstanten," Z. Phys. 23, 388–410 (1924).

K. B. Eriksson, I. Johansson, and G. Norlén, "Precision wavelength measurements connecting the Cs I 6*s*, 6*p*, and 6*d* levels, with a study of the correction for phase change in infrared interferometry," Ark. Fys. 28, 233–238 (1964).

J. R. Tessman, A. H. Kahn, and W. Shockley, "Electronic polarizabilities of ions in crystals," Phys. Rev. 92, 890–895 (1953).

E. J. Kelsey and L. Spruch, "Retardation effects on high Rydberg states: a retarded *R*^{-5} polarization potential," Phys. Rev. A 18, 15–25 (1978).

R. R. Freeman and D. Kleppner, "Core polarization and quantum defects in high-angular-momentum states of alkali atoms," Phys. Rev. A 14, 1614–1619 (1976).

U. Litzén, "The 5*g* levels of the alkali metals," Phys. Scr. 1, 253–255 (1970).

R. D. Cowan and J. B. Mann, "Stabilization of solution of the Hartree-Fock equations," J. Comput. Phys. 16, 160–166 (1974).

J. E. Mayer and M. G. Mayer, "The polarizabilities of ions from spectra," Phys. Rev. 43, 605–611 (1933).

J. E. Mayer and M. G. Mayer, "The polarizabilities of ions from spectra," Phys. Rev. 43, 605–611 (1933).

K. B. Eriksson, I. Johansson, and G. Norlén, "Precision wavelength measurements connecting the Cs I 6*s*, 6*p*, and 6*d* levels, with a study of the correction for phase change in infrared interferometry," Ark. Fys. 28, 233–238 (1964).

U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: II. Evaluation of the polarizabilities from observed spectra," Proc. Phys. Soc. London 92, 566–576 (1967).

H. Eissa and U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: I. A correction to the adiabatic approximation," Proc. Phys. Soc. London 92, 556–565 (1967).

P. Risberg, "A revision of the term systems for Na I and K I based on hollow cathode observations," Ark. Fys. 10, 583–606 (1956).

K. A. Safinya, T. F. Gallagher, and W. Sandner, "Resonance measurements of ƒ-h and ƒ-i intervals in cesium using selective and delayed field ionization," Phys. Rev. A 22, 2672–2678 (1980).

K. A. Safinya, T. F. Gallagher, and W. Sandner, "Resonance measurements of ƒ-h and ƒ-i intervals in cesium using selective and delayed field ionization," Phys. Rev. A 22, 2672–2678 (1980).

C. J. Sansonetti and K. L. Andrew, "Improved determinations of the n ^{2}D and n ^{2}F fine-structure intervals in neutral cesium," Phys. Rev. A 22, 1370–1374 (1980).

J. R. Tessman, A. H. Kahn, and W. Shockley, "Electronic polarizabilities of ions in crystals," Phys. Rev. 92, 890–895 (1953).

E. J. Kelsey and L. Spruch, "Retardation effects on high Rydberg states: a retarded *R*^{-5} polarization potential," Phys. Rev. A 18, 15–25 (1978).

J. R. Tessman, A. H. Kahn, and W. Shockley, "Electronic polarizabilities of ions in crystals," Phys. Rev. 92, 890–895 (1953).

K. B. S. Eriksson and I. Wenåker, "New wavelength measurements in Cs I," Phys. Scr. 1, 21–24 (1970).

K. Bockasten, "A study of C IV: term values, series formulae, and Stark effect," Ark. Fys. 10, 567–582 (1956).

P. Risberg, "A revision of the term systems for Na I and K I based on hollow cathode observations," Ark. Fys. 10, 583–606 (1956).

K. B. Eriksson, I. Johansson, and G. Norlén, "Precision wavelength measurements connecting the Cs I 6*s*, 6*p*, and 6*d* levels, with a study of the correction for phase change in infrared interferometry," Ark. Fys. 28, 233–238 (1964).

R. D. Cowan and J. B. Mann, "Stabilization of solution of the Hartree-Fock equations," J. Comput. Phys. 16, 160–166 (1974).

C. B. Ross, D. R. Wood, and P. S. Scholl, "Series limit and hydrogen like series in Pb II," J. Opt. Soc. Am. 66, 36–39 (1976).

R. D. Cowan and D. C. Griffin, "Approximate relativistic corrections to atomic radial wavefunctions," J. Opt. Soc. Am. 66, 1010–1014 (1976).

C. H. H. Van Deurzen, "Analysis of 4-ionized vanadium (V v)," J. Opt. Soc. Am. 67, 476–480 (1977).

H. J. Kleiman, "Interferometric measurements of cesium I," J. Opt. Soc. Am. 52, 441–447 (1961).

R. W. Shorthill and G. R. Fowles, "Interferometric measurements of isotope shifts in mercury II and mercury III with enriched isotopes," J. Opt. Soc. Am. 48, 459 (1958).

A. Fröman, J. Linderberg, and Y. Öhrn, "Penetration effe. in the ^{2}*F*-series of Cs I," J. Opt. Soc. Am. 54, 1064–1065 (1964).

K. Bockasten, "Polarization formula for the ^{2}*F*-series of Cs I," J. Opt. Soc. Am. 54, 1065 (1964).

H. Coker, "Empirical free-ion polarizabilities of the alkali metal, alkaline earth metal, and halide ions," J. Phys. Chem. 80, 2078–2084 (1976).

J. R. Tessman, A. H. Kahn, and W. Shockley, "Electronic polarizabilities of ions in crystals," Phys. Rev. 92, 890–895 (1953).

K. Bockasten, "Polarizability of Mg^{+2} derived from hydrogen-like terms of Mg II," Phys. Rev. 102, 729–730 (1956).

J. E. Mayer and M. G. Mayer, "The polarizabilities of ions from spectra," Phys. Rev. 43, 605–611 (1933).

C. J. Sansonetti and K. L. Andrew, "Improved determinations of the n ^{2}D and n ^{2}F fine-structure intervals in neutral cesium," Phys. Rev. A 22, 1370–1374 (1980).

D. C. Griffin, R. D. Cowan, and K. L. Andrew, "Instabilities in the iterative solution of the Hartree-Fock equations for excited electrons," Phys. Rev. A 3, 1233–1242 (1971).

K. Bockasten, "Mean values of powers of the radius for hydrogpnic electron orbits," Phys. Rev. A 9, 1087–1089 (1974).

E. J. Kelsey and L. Spruch, "Retardation effects on high Rydberg states: a retarded *R*^{-5} polarization potential," Phys. Rev. A 18, 15–25 (1978).

K. A. Safinya, T. F. Gallagher, and W. Sandner, "Resonance measurements of ƒ-h and ƒ-i intervals in cesium using selective and delayed field ionization," Phys. Rev. A 22, 2672–2678 (1980).

R. R. Freeman and D. Kleppner, "Core polarization and quantum defects in high-angular-momentum states of alkali atoms," Phys. Rev. A 14, 1614–1619 (1976).

U. Litzén, "The 5*g* levels of the alkali metals," Phys. Scr. 1, 253–255 (1970).

K. B. S. Eriksson and I. Wenåker, "New wavelength measurements in Cs I," Phys. Scr. 1, 21–24 (1970).

U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: II. Evaluation of the polarizabilities from observed spectra," Proc. Phys. Soc. London 92, 566–576 (1967).

H. Eissa and U. Öpik, "The polarization of a closed-shell core of an atomic system by an outer electron: I. A correction to the adiabatic approximation," Proc. Phys. Soc. London 92, 556–565 (1967).

M. Born and W. Heisenberg, "Über den Einfluss der Deformierbarkeit der lonen auf optische und chemische Konstanten," Z. Phys. 23, 388–410 (1924).

We refer to the polarizabilities derived from spectral data as effective polarizabilities because they may differ from the static polarizabilities of the ion core because of nonadiabatic effects in the atom. This is discussed in greater detail in Section 5.

B. Edlén, "Atomic spectra," in Handbuch der Physik, S. Flügge, ed. (Springer-Verlag, Berlin, 1964), Vol. XXVII.