element
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Information about Nobelium-254:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 254.090949 | ± | 0.000019 | amu |
| Excess Mass (Δ): | 84.718198 | ± | 0.017660 | MeV |
| Binding Energy: | 1885.597748 | ± | 0.017663 | MeV |
| β- Decay Energy: | -5.252000 | ± | 0.337000 | 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: 0+
- Half life: 55 s ( 55 sec., λ = 0.0126027 s-1)
- Mode of decay:
α to
(Q = 8.226 MeV)
Branch ratio: 90.00 %
- Mode of decay: E.C. to
(Q = 1.140 MeV)
Branch ratio: 10.00 %
- Mode of decay: SF
Branch ratio: 0.25 %
Meta state at 0.500 Mev
55 - Half life: 0.28 s ( 0.28 sec., λ = 2.47553 s-1)
- Mode of decay: γ (IT) to
(Q = 0.500 MeV)
Branch ratio: >80.00 %
- Mode of decay: SF
(Q = 0.500 MeV)
Branch ratio: >=0.20 %
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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