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actinium |
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actinium [ækˈtɪnɪəm] n (Chemistry / Elements & Compounds) a radioactive element of the actinide series, occurring as a decay product of uranium. It is used as an alpha-particle source and in neutron production. Symbol: Ac; atomic no.: 89; half-life of most stable isotope,227Ac: 21.6 years; relative density: 10.07; melting pt.: 1051°C; boiling pt.: 3200 ± 300°C [New Latin, from actino- + -ium]
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| From actinium to zirconium, this marvelous encyclopedia details all
115 elements of the periodic table to reveal the nature of each and its
relationship to us.
Scientists at the NIH have informed Isonics that the initial evaluation
of the Isonics-supplied Actinium was satisfactory. DOE's Pacific Northwest National Laboratory
will work with Theragenics(TM), Isotek, and its partners on research and
development to optimize the actinium extraction process. |
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