element
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Information about Rutherfordium-257:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 257.103072 | ± | 0.000285 | amu # |
| Excess Mass (Δ): | 96.011000 | ± | 0.265000 | MeV # |
| Binding Energy: | 1896.954000 | ± | 0.265000 | MeV # |
| β- Decay Energy: | -4.459000 | ± | 0.353000 | 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: 4.7 s ( 4.7 sec., λ = 0.147478 s-1)
- Mode of decay: α to
(Q = 9.250 MeV)
Branch ratio: 79.60 %
- Mode of decay: E.C. to
(Q = 3.400 MeV)
Branch ratio: 18.00 %
- Mode of decay: SF
Branch ratio: 2.40 %
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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