Relativistic equation-of-motion coupled-cluster method for the electron attachment problem

Abstract

The article considers the successful implementation of relativistic equation-of-motion coupled cluster method for the electron attachment problem (EA-EOMCC) at the level of single- and double- excitation approximation. The implemented relativistic EA-EOMCC method is employed to calculate ionization potential values of alkali metal atoms (Li, Na, K, Rb, Cs, Fr) and the vertical electron affinity values of LiX (X = H, F, Cl, Br), NaY (Y = H, F, Cl) starting from their closed-shell configuration. Both four-component and exact two-component calculations are done for all the opted systems. Further, we have shown the effect of spin-orbit interaction considering the atomic systems. The results of our atomic calculations are compared with the values from the NIST database and the results are found to be very accurate (< 1 %).

26 Pages, 3 figures, 6 Tables. Comments are welcome

References in corpus (3)

• Relativistic Equation of Motion Coupled-Cluster Method: Application to the closed-shell atomic systems
• Relativistic equation-of-motion coupled-cluster method for the ionization problem: Application to molecules
• Relativistic equation-of-motion coupled-cluster method for the double ionization potentials of the closed-shell atoms

Cited by in corpus (5)

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• Relativistic equation-of-motion coupled-cluster method using open-shell reference wavefunction
• Relativistic double-ionization equation-of-motion coupled-cluster method: Application to low-lying doubly ionized states