Spectroscopic investigations of the structure of highly ionised atoms have undergone
significant developments in recent years. The experimental progress is largely due to the …

Abstract The 2 2 P 1/2-2 2 S 1/2 (lowest-excited-state to ground-state) energy splitting in
lithiumlike uranium, which has large quantum-electrodynamic corrections, has been …

A theoretical study of the two-photon emission rate from the 1s2s 1 S state of two-electron
ions is presented. High-precision values of the nonrelativistic emission rate for ions with …

Systematic calculations of two-photon decay rates of metastable 2 1 S 0 and 2 3 S 1 states
are presented for heliumlike ions with nuclear charges in the range Z= 2–100. These …

The magnetic interaction has been shown to produce inversion of 1s2p P 1 3 and 1s2p P 0 3
for Z≤ 3 and Z≥ 46. In this paper we have used the multiconfiguration Dirac-Fock method to …

Recent progress in the study of the photon emission from highly charged heavy ions is
reviewed. These investigations show that high-Z ions provide a unique tool for improving the …

The physics of highly charged ions continues to be one of the most active and interesting
fields of atomic physics. A large fraction of the characteristic radiation of such ions lies in the …

The quantum information theoretic measures in terms of Shannon entropy and Fisher
entropy (both in position and momentum spaces) on the ground, excited as well as virtual …

A theoretical study of the one-and two-photon spontaneous emission rates from the 2 s1/2
state of one-electron ions is presented. High-precision values of the relativistic emission …

The spontaneous two-photon decay rates from the 1 s 2 s S 0 1 level to the ground state 1 s
2 S 0 1 in helium and its isoelectronic ions through neon (Z= 10) are calculated, including …