The Use of Time-Resolved Spectroscopy in the Investigation of Electrode Phenomena in Sparks
The appearance of spectral lines in a spark in approximately 10-8 sec after the spark begins indicates the possibility that some other method besides electron heating is responsible for sample vaporization. Somerville postulates a process similar to sputtering as a possible mechanism for sample vaporization. Experimental evidence shows metallic ions are excited only when the sample is the cathode during an oscillating discharge. Although these time-resolved spectra do not as yet uniquely explain the vaporization mechanism, the evidence supports Somerville’s postulate. Equipment for time-resolved spectroscopy is relatively uncomplicated and could be added to an existing spectrographic laboratory at reasonable cost. Additional research in this field will ultimately aid spectroscopy as an analytical tool.
KeywordsCopper Line Carbon Line Microsecond Time Scale Horizontal Slit Research Laboratory General Motor
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