element
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Information about Astatine-203:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 202.986847 | ± | 0.000129 | amu |
| Excess Mass (Δ): | -12.251737 | ± | 0.119727 | MeV |
| Binding Energy: | 1584.230228 | ± | 0.119728 | MeV |
| β- Decay Energy: | -6.026000 | ± | 0.429000 | 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:
- Spin: 9/2-
- Half life: 7.4 min ( 444 sec., λ = 0.00156114 s-1)
- Mode of decay:
E.C. to
(Q = 5.060 MeV)
Branch ratio: 69.00 %
- Mode of decay:
α to
(Q = 6.210 MeV)
Branch ratio: 31.00 %
- Possible parent nuclides:
- α from
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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