element
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Information about Neptunium-231:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 231.038233 | ± | 0.000054 | amu |
| Excess Mass (Δ): | 35.613955 | ± | 0.050592 | MeV |
| Binding Energy: | 1756.102748 | ± | 0.050593 | MeV |
| β- Decay Energy: | -2.818000 | ± | 0.113000 | 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: 48.8 min ( 2928 sec., λ = 0.000236731 s-1)
- Mode of decay:
E.C. to
(Q = 1.840 MeV)
Branch ratio: 98.00 %
- Mode of decay:
α to
(Q = 6.370 MeV)
Branch ratio: 2.00 %
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)
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