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Self-Absorption in Copper Hollow Cathode Discharges: Effects on Spectral Line Shape and Absorption Sensitivity

Volume 42, Number 4 (June 1988) Page 572-576

Phillips, Hugh A.; Lancaster, Herbert L.; Denton, M. Bonner; Rózsa, Karoly; Apai, Pal


The intensity of the hyperfine doublet of the Cu(I) 324.8-nm transition was observed as a function of current, fill gas, and fill gas pressure for a new design of hollow cathode lamp incorporating a positive column and an enlarged volume cathode cavity. The intensity ratio of the two components, which reflects the degree of self-absorption, and the flame absorption sensitivity were compared with those of a conventional hollow cathode lamp. Higher intensity, better component ratio, and increased absorption sensitivity were found in the new lamp.