Bound states of helium atom in dense plasmas

We have obtained the bound 1s2 1S, 1s2s 1,3S, and 1s2p 1,3P 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 1s2 1S, 1s2s 1,3S, and 1s2p 1,3P states energies along with the ionization potential, the energy splitting between the 1s2s 3S, and 1s2s 1S 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.