Abstract
A computer graphics system has been programmed to allow experimental thermal-desorption spectra to be matched visually with the sum of up to twelve theoretical first-order desorption peaks. The system allows the resulting theoretical spectrum to be stored for later recovery or plotted along with the experimental spectrum using an X–Y plotter. The temperatures and amplitudes of the chosen theoretical peaks and the rms difference between the theoretical and experimental spectra are available for either display or printout. Analysis of a series of helium desorption spectra showed that peak temperatures could be determined to within ±0.8%, and that the main limitations were attributable to temperature uncertainties and noise in the experimental spectra.
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