Ab initio Potential Energy Curves for the X²Π, A²Σ⁺ B²Σ^-, C⁴Σ^-, D⁴Π States of New Laser Medium NaS

A new laser medium NaS system of Ⅰ～Ⅵ column elements combination was first suggested.Potential energy curves for the X²Π, A²Σ⁺, B²Σ^-, C⁴Σ^-, C⁴Π states of NaS was calculated using ab initio method.Calculation-results confirm the existence of NaS.Spectroscopic constants for the X²Π, A²Σ⁺ states of NaS are reported.In addition, we have compared level structure of NaS with HS, NaO.