Bound states of helium atom in dense plasmas

Abstract

Abstract We have obtained the bound 1 s 2 1 S , 1 s 2 s 1,3 S , and 1 s 2 p 1,3 P states energies of helium atom in dense plasma environments in accurate variation calculations. A screened Coulomb potential to represent the Debye model is used for the interaction between the charged particles. A correlated wave function consisting of a generalized exponential expansion has been used to take care of the correlation effect. The 1 s 2 1 S , 1 s 2 s 1,3 S , and 1 s 2 p 1,3 P states energies along with the ionization potential, the energy splitting between the 1 s 2 s 3 S , and 1 s 2 s 1 S states, transition energies between the ground state and low‐excited states of He estimated for various Debye lengths, are reported. The results show high degree of accuracy even under strong plasma conditions. © 2005 Wiley Periodicals, Inc. Int J Quantum Chem, 2006