element
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Information about Astatine-217:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 217.004710 | ± | 0.000008 | amu |
| Excess Mass (Δ): | 4.386981 | ± | 0.007541 | MeV |
| Binding Energy: | 1680.590029 | ± | 0.007547 | MeV |
| β- Decay Energy: | 0.740598 | ± | 0.007903 | 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: 32.3 ms ( 0.0323 sec., λ = 21.4597 s-1)
- Mode of decay:
α to
(Q = 7.202 MeV)
Branch ratio: 99.99 %
- Mode of decay: β- to
(Q = 0.740 MeV)
Branch ratio: 0.01 %
- 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)
Magnetic Dipole Moments and Electric Quadrupole Moments
| Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
| 0 | 32 ms | 9/2- | | 3.8(2) | | | | | NO/S | HFI 75 323 (92) |
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N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.
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