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It is also a good source for the relatively-small numbers of free neutrons in the laboratory which are liberated when beryllium nuclei are struck by energetic alpha particles[3] producing the nuclear reaction
9
4Be + 4
2He → 12
6C + n , where 4
2He is an alpha particle and 12
6C is a carbon-12 nucleus.[4]
[edit]Isotopes and nucleosynthesis
Main articles: Isotopes of beryllium and beryllium-10
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