Ab initio MCDHF calculations of the In and Tl electron affinities and their isotope shifts

Abstract

We report multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction calculations on the Thallium (Tl) electron affinity, as well as on the excited energy levels arising from the ground configuration of Tl${}^{-}$. The results are compared with the available experimental values and further validated by extending the study to its homologous, lighter element, Indium (In), belonging to Group 13 (III.A) of the periodic table. The calculated electron affinities of In and Tl, 383.4 and 322.8 meV, agree with the latest measurements by within 1\%. Three bound states ${}^3{P}_{0,1,2}$ are confirmed in the $5s^{2}5p^2$ configuration of In${}^{-}$ while only the ground state ${}^3{P}_0$ is bound in the $6s^{2}6p^2$ configuration of Tl${}^{-}$. The isotope shifts on the In and Tl electron affinities are also estimated. The E2/M1 intraconfiguration radiative transition rates within $5s^{2}5p^2{}^3{P}_{0,1,2}$ of In${}^{-}$ are used to calculate the radiative lifetimes of the metastable ${}^3{P}_{1,2}$ levels.

References in corpus (12)

• QED theory of the nuclear recoil effect in atoms
• Nuclear deformation effect on the binding energies in heavy ions
• The electron affinity of astatine
• Ultracold anions for high-precision antihydrogen experiments
• Observation of Electric-Dipole Transitions in the Laser-Cooling Candidate Th${}^{-}$
• Isotope shifts of the 2$p_{3/2}$-2$p_{1/2}$ transition in B-like ions
• Electron affinities of At and its homologous elements Cl, Br, and I
• Core correlation effects in multiconfiguration calculations of isotope shifts in Mg I
• QED theory of the specific mass shift in atoms
• Resolving a discrepancy between experimental and theoretical lifetimes in atomic negative ions
• QED theory of the normal mass shift in few-electron atoms
• Electronic isotope shift factors for the Ir $5d^{7}6s^{2} \ ^{4}\!F_{9/2} \to (\mbox{odd},J= 9/2)$ line at 247.587 nm

Cited by in corpus (2)

• Model-QED-operator approach to relativistic calculations of the nuclear recoil effect in many-electron atoms and ions
• Relativistic coupled cluster calculations of the electron affinity and ionization potential of Nh(113)