Production by Cosmic Rays of Helium-3 in Meteorites


THE helium content of iron meteorites varies from less than 10−9 c.c. to 4 × 10−5 c.c. per gm.1. Since their uranium and thorium content is fairly constant, this variation was considered as an indication of their very different ages. During the past decade, however, it has been discovered that by the impact of cosmic rays on matter helium is formed, and… (More)
DOI: 10.1038/172200a0


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