Abstract
IN the course of some tests with very sensitive Schumann plates supplied by Messrs. Adam Hilger, I have obtained mass-spectra of mercury of an intensity greater than any previously photographed. On the best of these there are unmistakable traces of two new lines 197 and 203. The first is certainly due to a new isotope. The chance that the second is a hydride of the strong line 202 is considered small, for the conditions were unfavourable to the formation of hydrides, while under very favourable conditions in previous experiments no trace of the line had been seen. Their abundance was estimated by comparison with the faint isotope 196 previously determined to be present to the extent of 0.10 per cent. Assuming this figure, photometry indicated that 197 and 203 were present roughly to the extent of 0.01 and 0.006 per cent respectively. Their effect on the mean atomic weight will therefore be quite negligible.
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ASTON, F. New Isotopes of Mercury. Nature 130, 847 (1932). https://doi.org/10.1038/130847a0
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DOI: https://doi.org/10.1038/130847a0
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