Vibrational Analysis for a New CuCl Band System Excited by Active Nitrogen

The CuCl band spectra in the near ultraviolet, first observed by Strutt and Fowler who used active nitrogen excitation, were photographed and classified. The wave number of any band head in this system may be calculated from the formula ${ν}=25, 282+[383({v}^{{'}}+1/2){-}2{({v}^{{'}}+1/2)}²]{-}[415({v}^{{'}{'}}+1/2){-}{({v}^{{'}{'}}+1/2)}²].$ This band system has a common lower state with five other systems in the visible, observed in absorption and analyzed by Ritschl.