Oпpeдeлehиe othocиteлъhoгo pacпoлoжehия heкomБиhиpyющиx элeкtpohhъix coctoяhий дbyxatomhъix moлeкyл. Ochobhoe элeкtpohhoe coctoяhиe ZrO

A method is proposed for determining the energy difference of noncombining electronic states and the type of ground electronic state of molecules, based on studying the temperature dependence of integral absorption coefficients of molecular bands in a reflected shock wave plasma over a wide range of temperatures. The method is used to determine the relative position of singlet and triplet ZrO electronic states. As the result of measurements of integral absorption coefficients of 0, 0 bands of ${}^1\text{Σ}{}^{\mathrm{+}}\text{-}{}^1\text{Σ}{}^{\mathrm{+}}$ and ${}^3\text{Δ -}{}^3\text{Δ}$ systems in the temperature interval 3370–5200°K, it is shown that ¹Σ⁺ state is the ZrO ground state, whilst T₀(a³Δ) = 1700 ± 250 cm^-1.