Non-relativistic ab initio calculations for $2^{2}S$, $2^{2}P$ and $3^{2}D$ lithium isotopes: Applications to polarizabilities and dispersion interactions

Abstract

The electric dipole polarizabilities and hyperpolarizabilities for the lithium isotopes ${}^6$Li and ${}^7$Li in the ground state $2^{2}S$ and the excited states $2^{2}P$ and $3^{2}D$, as well as the leading resonance and dispersion long-range coefficients for the Li($2^{2}S$)--Li($2^{2}S$) and Li($2^{2}S$)--Li($2^{2}P$) systems, are calculated nonrelativistically using variational wave functions in Hylleraas basis sets. Comparisons are made with published results, where available. We find that the value of the second hyperpolarizability of the $2^{2}S$ state is sensitive to the isotopic mass due to a near cancellation between two terms. For the $3^{2}D$ state polarizability tensor the calculated components disagree with those measured in the sole experiment and with those calculated semi-empirically.

20 pages

References in corpus (4)

• Interactions and dynamics in Li + Li_2 ultracold collisions
• Fine and hyperfine splitting of the 2P state in Li and Be${}^{+}$
• An {\it ab initio} relativistic coupled-cluster theory of dipole and quadrupole polarizabilities: Applications to a few alkali atoms and alkaline earth ions
• Ab initio determination of polarizabilities and van der Waals coefficients of Li atoms using the relativistic CCSD(T) method

Cited by in corpus (6)

• High-precision nonadiabatic calculations of dynamic polarizabilities and hyperpolarizabilities for the lowlying vibrational-rotational states of hydrogen molecular ions
• Calculations of polarizabilities and hyperpolarizabilities for the Be${}^{+}$ ion
• Interaction potentials and ultracold scattering cross sections for the ${}^7$Li${}^{+}$-${}^7$Li ion-atom system
• Calculations of long-range three-body interactions for Li($2{}^{2}S$)-Li($2{}^{2}S$)-Li($2{}^{2}P$)
• Long-range additive and nonadditive potentials in a hybrid system: Ground state atom, excited state atom, and ion
• Relativistic hyperpolarizabilities for atomic H, Li, and Be${}^{+}$ systems