Spectral line intensity vs time measurements were obtained from single, high-energy discharges by means of a photo-multiplier and cathode ray oscillograph. Effects of small changes in current pulse shape upon line intensities are observed for lines representing the first, second, and third spectra of aluminum. Line intensity peaks are observed in the spectra of ionized atoms, especially during the initial steep current rise of short duration pulses It is concluded that an improvement in the spectrographic sensitivity of spectra of ionized atoms can be achieved by employing an electrical pulse of extremely short duration in combination with detectors, which will resolve and record intensity maxima.
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