The Lagrange-mesh method is an approximate variational method taking the form of
equations on a grid thanks to the use of a Gauss-quadrature approximation. The variational …

The Hartree-Fock equations for many-electron atoms embedded in a plasma medium are
solved using two different plasma models:(a) Debye-Hückel screening (DHS) potential and …

Critical parameters in three screened potentials, namely, Hulthén, Yukawa, and exponential
cosine screened Coulomb potential are reported. Accurate estimates of these parameters …

The energy eigenvalues of the ground state helium atom and lowest two excited states
corresponding to the configurations 1s2s embedded in the plasma environment using …

In this work, we show Hartree–Fock (HF) results for the Shannon entropy, Rényi entropy,
Tsallis entropy, Onicescu information energy, and ground‐state properties of the helium …

Fisher information is calculated for the ground state of He-isoelectronic series, in position ()
space. The results are given and discussed as a function of the nuclear charge (Z) and the …

Complete critical bound region of the generalized exponential cosine screened Coulomb
potential - IOPscience Skip to content IOP Science home Accessibility Help Search Journals …

The expectation values of radial and angular geometric quantities⟨ r⟩,⟨ r-1⟩,⟨ r 2⟩,⟨ r
12⟩,⟨ r 12-1⟩,⟨ r 12 2⟩,⟨ r<⟩,⟨ r>⟩,⟨ cos (θ 12)⟩, and⟨ θ 12⟩ for the ground states of …

We have investigated the S-wave resonance states in positron-hydrogen system embedded
in dense quantum plasmas using Hylleraas-type wave functions within the framework of the …

Positronium (Ps) formation processes in collisions between positrons and alkali atoms (Li,
Na, K, Rb and Cs) in Debye plasma environments have been investigated using the …