$R$-matrix calculations of electron collisions with lithium atom at low energies

Abstract

$R$-matrix calculations of the electron collisions with lithium atom at energies below the $3s$ excitation threshold are presented. The ${}^1{S}^e$, ${}^3{S}^e$ and ${}^1{P}^o$ phase shifts calculated in the near-threshold energy range are in excellent agreement with previous theoretical studies. The threshold behavior of the ${}^3{P}^o$ phase shift is accurately analyzed along with the resonance located at the scattering energy $\sim 60$ meV. The phase shifts and cross sections calculated here show two resonances below the $3s$ threshold that have not been previously reported.

arXiv comment11 pages, 9 figures, 2 tables

References in corpus (6)

• Rydberg trimers and excited dimers bound by internal quantum reflection
• The ground state of the polar alkali-Strontium molecules: potential energy curve and permanent dipole moment
• Excitation of weakly-bound molecules to trilobite-like Rydberg states
• Rydberg molecules for ion-atom scattering in the ultracold regime
• Adiabatic potential energy curves of long-range Rydberg molecules: Two-electron R-matrix approach
• Bound state spectra and properties of the doublet states in three-electron atomic systems

Cited by in corpus (4)

• Trilobites, butterflies, and other exotic specimens of long-range Rydberg molecules
• Precision spectroscopy of negative-ion resonances in ultralong-range Rydberg molecules
• Dressed ion-pair states of an ultralong-range Rydberg molecule
• Long-range Rydberg molecule Rb${}_2$: Two-electron \textit{R}-matrix calculations at intermediate internuclear distances