Bound D-states of helium atom under Debye screening

摘要

We have investigated the 1snd D-1,D-3 (3 <= n <= 7) state energies of helium atom embedded in weakly coupled plasma environments using the Rayleigh-Ritz variational method. The effect of the plasma environment is taken care of using a Debye screening model. A correlated wave function involving exponential expansion has been used to represent correlation between the charge particles. The bound 1snd D-1,D-3 (3 <= n <= 7) state energies of helium for various Debye lengths along with the excitation energies of few singlet and triplet states are reported. Our results are useful references to atomic physics, plasma physics, and astrophysics research communities. (c) 2006 Wiley Periodicals, Inc.