Table 1: Some of the acronyms used in this work.

HF Hartree Fock method
NR Nonrelativistic
DHF Dirac or relativistic HF
DCH Dirac-Coulomb Hamiltonian
MP2 Møller-Plesst 2nd-order perturbation theory
CCSD(T) Coupled cluster singles-doubles (triples)
SFH Relativistic spin-free Hamiltonian
(TD)DFT (Time-depended) density functional theory
xc Exchange-correlation
LR(A) Linearresponse (approximation)
ALR Adiabatic LR
srLDAMP2 Short-range LDA, long-range MP2