element
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Information about Astatine-197:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 196.993290 | ± | 0.000376 | amu # |
| Excess Mass (Δ): | -6.250000 | ± | 0.350000 | MeV # |
| Binding Energy: | 1529.801000 | ± | 0.350000 | MeV # |
| β- Decay Energy: | -7.797000 | ± | 0.448000 | 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: 0.35 s ( 0.35 sec., λ = 1.98042 s-1)
- Mode of decay:
α to
(Q = 7.100 MeV)
Branch ratio: 96.00 %
- Mode of decay: E.C. to
(Q = 7.200 MeV)
Branch ratio: 4.00 %
Meta state at 0.052 Mev
- Spin: (1/2+)
0.35
- Half life: 3.7 s ( 3.7 sec., λ = 0.187337 s-1)
- Mode of decay:
α to
(Q = 0 7.152 MeV)
Branch ratio: <=100.00 %
- Mode of decay: E.C. to
(Q = 7.252 MeV)
- 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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