Amending the story of helium-3
OCT 01, 2010
DOI: 10.1063/1.4797241
Helium-3, writes David Kramer, “occurs at a ratio of 0.2 parts per million of 4He.” However, according to the International Union of Pure and Applied Chemistry, 1 the natural abundance of 3He is 1.37 ppm. Otherwise, the article was excellent.
References
1. R. K. Harris et al., Pure Appl. Chem. 73, 1795 (2001), available at http://www.iupac.org/publications/pac/2001/pdf/7311x1795.pdf .
More about the authors
Stan Sykora, (sykora@ebyte.it) Castano Primo, Italy .
© 2010 American Institute of Physics
