element
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Information about Einsteinium-249:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 249.076405 | ± | 0.000032 | amu # |
| Excess Mass (Δ): | 71.170000 | ± | 0.030000 | MeV # |
| Binding Energy: | 1861.136000 | ± | 0.030000 | MeV # |
| β- Decay Energy: | -2.440000 | ± | 0.145000 | 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: 102.2 min ( 6132 sec., λ = 0.000113038 s-1)
- Mode of decay:
E.C. to
(Q = 1.450 MeV)
Branch ratio: 99.43 %
- Mode of decay:
α to
(Q = 6.940 MeV)
Branch ratio: 0.57 %
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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