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The aim of this work is to determine quantum mechanically the width Γ and the shift Δ of the lithium Li(2p→2s) and potassium K(4p→4s) resonance lines when these atoms are evolving in their parent gases. The interaction potentials along which the atoms Li(2p)+Li(2s) and K(4p)+K(4s) approach each other are constructed from reliable data. The radial wave equation is then solved numerically by using these...
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