Abstract

A new system of red degraded bands in the 3700–4000 A region has been obtained in the spectrum of the CuBr molecule excited in an electrodeless discharge tube by a microwave oscillator. The band heads of this system are given by the formula: $$\begin{gathered} v ^{63} Cu ^{79} Br = 25538 \cdot 5 + 281 \cdot 9 \left( {\upsilon ' + \tfrac{1}{2}} \right) - 1 \cdot 35 \left( {\upsilon ' + \tfrac{1}{2}} \right)^2 - 314 \cdot 4 \hfill \\ \left( {\upsilon '' + \tfrac{1}{2}} \right) + 0 \cdot 86 \left( {\upsilon '' + \tfrac{1}{2}} \right)^2 \hfill \\ \end{gathered} $$ . It has been found that the lower electronic state of this system is the same as the common lower state of the three known band systems, which is also the ground state of the molecule.

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