element
|
Information about Fermium-249:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 249.079024 | ± | 0.000153 | amu # |
| Excess Mass (Δ): | 73.611000 | ± | 0.142000 | MeV # |
| Binding Energy: | 1857.913000 | ± | 0.142000 | MeV # |
| β- Decay Energy: | -3.705000 | ± | 0.265000 | 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: 2.6 min ( 156 sec., λ = 0.00444325 s-1)
- Mode of decay: E.C. to
(Q = 2.440 MeV)
Branch ratio: ~85.00 %
- Mode of decay:
α to
(Q = 7.810 MeV)
Branch ratio: ~15.00 %
- Possible parent nuclides:
- α from
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)
|