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Published online by Cambridge University Press: 24 October 2008
The β-ray spectrum of radium C is remarkable for the large number of faint lines of about equal intensity which occur above Hρ 4900. These lines were first measured by Rutherford and Robinson and many of them were found again by Ellis in a reinvestigation of this spectrum. It was then stated that no attempt was made to check the existence of each faint line and that Rutherford and Robinson's measurements of the faint lines were taken over directly, with certain necessary adjustments to the absolute energies. Subsequently the intensities of the β-ray lines in this spectrum were measured by Ellis and Wooster and by Ellis and Aston and the faint lines were again treated in much the same way.
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* Cambridge University Press.