element
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Information about Protactinium-221:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 221.021864 | ± | 0.000055 | amu |
| Excess Mass (Δ): | 20.365941 | ± | 0.051669 | MeV |
| Binding Energy: | 1692.202240 | ± | 0.051670 | MeV |
| β- Decay Energy: | -4.180000 | ± | 0.116000 | 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: 5.9 µs ( 5.9×10-06 sec., λ = 117483 s-1)
- Mode of decay:
α to
(Q = 9.250 MeV)
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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