element
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Information about Radium-221:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 221.013908 | ± | 0.000008 | amu |
| Excess Mass (Δ): | 12.954995 | ± | 0.007039 | MeV |
| Binding Energy: | 1701.960247 | ± | 0.007046 | MeV |
| β- Decay Energy: | -1.553717 | ± | 0.050813 | 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: 28 s ( 28 sec., λ = 0.0247553 s-1)
- Mode of decay:
α to
(Q = 6.886 MeV)
- Mode of decay: 14C
(Q = 6.886 MeV)
Branch ratio: 1E-12 %
- 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 | 30 s | 5/2- | | -0.180(2) | | | | "[213,225Ra]" | "CFBLS, R" | NP A483 244 (88)/PRL 59 771 (87) |
| | | | | | +1.98(11) st | | | CFBLS | ZP D11 105 (89) |
| | | | | | +1.9(2) st | | | "CFBLS, R" | NP A483 244 (88)/ZP D4 227 (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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