Abstract
When there are many doublets of the same ion species, of which fractional mass difference is ro, it is possible to construct consistent artficial mass scales in terms of ro by only position measurements of these doublet lines. With one of these mass scale, the author studies on two possibilities of the mass calibration method suitable for a very high dispersion type mass spectrograph without any sacrifices for precisions of calibrations, which are, at least, the same order of magnitude for those of a single doublet separations, …the general mass center and the doublet scaling method. The former is rather useful for estimations dispersion constants α1 and α2 which are main contributions to the correction terms in an artificial mass scale. Preliminary experimental studies on the latter method are carried out to a few spectra photographed with the Bainbridge-Jordan type apparatus, though these spectra are rather unsuitable even for the preliminary analyses. The doublet scaling method would be a proper mass calibration method for spectra on a photographic plate.
