10 Be in commercial beryllium |
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Authors: | Roy Middleton Jeffrey Klein Louis Brown Fouad Tera |
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Affiliation: | Roy Middleton and Jeffrey Klein Physics Department, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA;Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D.C. 20015, USA |
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Abstract: | 10Be has been observed at a level of about 10?14 in four commercially available beryllium compounds. The possibility that this 10Be arises from cross-talk in the ion source has been eliminated. On the other hand, beryllium oxide extracted from beryl crystals found at a depth of 30–40 feet in a lithium mine in South Dakota shows no indication of containing 10Be. An upper limit on its ratio is 1.7 × 10?15 at the 95% confidence level. |
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