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The effect of Debye plasma on the1 s 2  s 22  Sresonance states in the scattering of electron from helium atom has been investigated within the framework of the stabilization method. The interactions among the charged particles in Debye plasma have been modelled by Debye–Huckel potential. The1 s 2 sexcited state of the helium atom has been treated as consisting of aH  e +ionic core plus an electron moving around. The interaction between the core and the electron has then been modelled by a model potential. It has been found that the background plasma environment significantly affects the resonance states. To the best of our knowledge, such an investigation of1 s 2  s 22  Sresonance states of the electron–helium system embedded in Debye plasma environment is the first reported in the literature

An Investigation on the He−(1s2s2 2S) Resonance in Debye Plasmas