Chemical Physics Letters, Vol.402, No.4-6, 544-548, 2005
Doubly-excited 2s(2) S-1(e) resonance state of helium embedded in Debye plasmas
We have made a first investigation on the resonances in two electron systems in various model plasma environments. The 2S(2) Se-1 autoionization resonance state in the helium atom is determined by calculating the density of resonance states using the stabilization method. A screened Coulomb potential obtained from the Debye model is used to represent the interaction between the charged particles. A correlated wave function has been used to represent the correlation effect between the three charge particles. The calculated resonance energies and widths for various Debye parameters ranging from infinity to a small value along with the ground state energies are reported. (C) 2005 Elsevier B.V. All rights reserved.