The spark spectrum of copper

Abstract

The following is an account (A) of a determination of the lowest term of the spectrum of ionised copper (Cu II) and (B) of the testing of Shenstone’s allocation of terms in this spectrum. While doing this some new terms were found (C). (A) Discussion of Sources . A method of obtaining spectrograms with one very short exposure (of the order of 1/100th second) by the fusing of wires has been described in a previous paper by the author. When the wires are fused in air at atmospheric pressure, lines involving low energy levels are absorbed, while those involving outer levels tend to be displaced.