Abstract
London
The Royal Society, January 27.
E. GLTJCKAUF and F. A. PANETH: Identification and measurement of helium formed in beryllium by gamma rays. While it has been known for some time that the beryllium nucleus, irradiated by y-rays, emits neutrons, it could not be decided whether the nucleus is thereby transformed into a stable isotope of beryllium of mass eight, or into two helium atoms. By a micro-chemical method, helium was detected in beryllium after irradiation by the y-rays of radon. In one of the experiments, the number of neutrons simultaneously emitted during the irradiation was determined by measuring the helium produced by these neutrons in methyl borate; a comparison of the two helium quantities showed that the main final product of the y-irradiation of beryllium is helium and not the beryllium isotope.
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Societies and Academies. Nature 141, 259 (1938). https://doi.org/10.1038/141259a0
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DOI: https://doi.org/10.1038/141259a0