The absorption spectrum of CuH in the 2350- to 1890-Å region

The high-dispersion absorption spectrum of the CuH molecule has been photographed in the ～2500- to 1750-Å region. Observations include the previously reported $\text{D}{}^1\text{Π}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$ and $\text{E}{}^1\text{Σ}{}^{\mathrm{+}}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$ transitions and four new transitions which occur between 2100 and 1890 Å: $\text{F 1}{}^{\mathrm{\pm }}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$, $\text{G 0}{}^{\mathrm{+}}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$, $\text{H 1}{}^{\mathrm{\pm }}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$, and $\text{I 1}{}^{\mathrm{\pm }}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$. The $\text{D}{}^1\text{Π}$ state has been characterized through v = 2 while the new observations on $\text{E}{}^1\text{Σ}{}^{\mathrm{+}}$ include v = 11 through 16. The F, H, and I states are characterized through v = 1. All of the upper states exhibit perturbations. In addition the H 1^± and I 1^± states show signs of predissociation.