element
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Information about Francium-221:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 221.014246 | ± | 0.000008 | amu |
| Excess Mass (Δ): | 13.269739 | ± | 0.007530 | MeV |
| Binding Energy: | 1702.427855 | ± | 0.007536 | MeV |
| β- Decay Energy: | 0.314745 | ± | 0.009358 | 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: 5/2-
- Half life: 4.9 min ( 294 sec., λ = 0.00235764 s-1)
- Mode of decay:
α to
(Q = 6.458 MeV)
- Mode of decay: β- to
(Q = 0.312 MeV)
Branch ratio: <0.10 %
- Mode of decay: 14C
(Q = 0.312 MeV)
Branch ratio: 9E-13 %
- Possible parent nuclides:
- β- from
- 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 | 4.8 m | 5/2- | | +1.58(3) | | | | [211Fr] | CFBLS | EPL 3 175 (87) |
| | | | +1.58(3) | | | | [211Fr] | ABLS | PL 163B 66 (85) |
| | | | | | -0.98(6) st | | | "ABLS, R" | PL 163B 66 (85)/NP A468 1 (87) |
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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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