element
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Information about Astatine-221:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 221.018140 | ± | 0.000320 | amu # |
| Excess Mass (Δ): | 16.897000 | ± | 0.298000 | MeV # |
| Binding Energy: | 1700.365000 | ± | 0.298000 | MeV # |
| β- Decay Energy: | 2.501000 | ± | 0.315000 | MeV # |
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra,
Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
Radioactive Decay Data:
- Half life: 2.3 min ( 138 sec., λ = 0.00502281 s-1)
- Mode of decay: β- to
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)
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