element
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Information about Actinium-209:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 209.009569 | ± | 0.000261 | amu |
| Excess Mass (Δ): | 8.913219 | ± | 0.242692 | MeV |
| Binding Energy: | 1608.363795 | ± | 0.242693 | 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: 0.10 s ( 0.1 sec., λ = 6.93147 s-1)
- Mode of decay:
α to
(Q = 7.730 MeV)
Branch ratio: ~99.00 %
- Mode of decay: E.C. to
(Q = 7.110 MeV)
Branch ratio: ~1.00 %
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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