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Atomic Species Spectroscopic Constants Molecular Species Spectroscopic Constants

H₂ H₂⁺ H₂^- C₂ C₂⁺ C₂^- CH CH⁺ CH^- CN CN⁺ CN^- CO CO⁺ CO^- CO₂ CO₂⁺ N₂ N₂⁺ N₂^- NH NH⁺ NH^- NO NO⁺ NO^- O₂ O₂⁺ O₂^- OH OH⁺ OH^-

Electronic Levels Bound-Bound Transitions Bound-Free Transitions Free-Free Transitions

X¹Σ_g⁺ A³Σ_u⁺ B³Π_g B'³Σ_u^- a'¹Σ_u^- a¹Π_g w¹Δ_u G³Δ_g C³Π_u E³Σ_g⁺ C'³Π_u b¹Π_u b'¹Σ_u⁺ c₃¹Π_u c'₄¹Σ_u⁺ H³Π_u o₃¹Π_u x¹Σ_g^- k¹Π_g y¹Π_g z¹Δ_g c₄¹Π_u c'₅¹Σ_u⁺