element
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Information about Radon-221:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 221.015455 | ± | 0.000108 | amu # |
| Excess Mass (Δ): | 14.396000 | ± | 0.100000 | MeV # |
| Binding Energy: | 1702.084000 | ± | 0.100000 | MeV # |
| β- Decay Energy: | 1.127000 | ± | 0.100000 | 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: 7/2(+)
- Half life: 25 min ( 1500 sec., λ = 0.000462098 s-1)
- Mode of decay:
β- to
(Q = 1.220 MeV)
Branch ratio: 78.00 %
- Mode of decay:
α to
(Q = 6.146 MeV)
Branch ratio: 22.00 %
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)
Magnetic Dipole Moments and Electric Quadrupole Moments
| Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
| 0 | 25 m | (7/2+) | | -0.020(1) | | | | [209Rn] | CFBLS | PRL 60 2133 (88) |
| | | | | | -0.38(4) | | | "CFBLS, R" | Bk88 NFFS 126 (88) |
| | | | | | -0.47(5) | | | CFBLS | CERN EP/87-15 (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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