Abstract
THE method of anode-ray analysis which was used to determine the isotopes of lithium (NATURE, February 24, p. 827) has recently been applied to the case of beryllium. A well-marked parabola was found corresponding to a single charge and an atomic weight 9.0±0.1 (Na=23). No second line was observed which could with certainty be attributed to beryllium, but the parabola at 9.0 was not so strong as that at 7.0 for lithium, and it is doubtful if one of a tenth the intensity could be observed. On one plate a scarcely perceptible indication of a line was found in the neighbourhood of 10, but as more recent photographs, in which the line at 9 was stronger, did not show it, it seems likely that it was not due to beryllium. No indication was found which would suggest that the atom of beryllium can lose two electrons under the conditions of these experiments.
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THOMSON, G. Anode Rays of Beryllium. Nature 107, 395 (1921). https://doi.org/10.1038/107395d0
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DOI: https://doi.org/10.1038/107395d0
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