PRODUCTION DE RAIES SPECTRALES DE He I ET He II PAR L'EXCITATION D'ATOMES He+ ACCÉLÉRÉS AU MOYEN D'UN VAN DE GRAAFF

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Abstract
We have used the fast beam-foil technique to excite various levels in He I and He II, and have observed three spectral lines in He I and six in He II. Three of the He II lines exhibit peculiar intensity patterns.