element
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Information about Americium-239:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 239.053018 | ± | 0.000003 | amu |
| Excess Mass (Δ): | 49.386389 | ± | 0.002803 | MeV |
| Binding Energy: | 1805.336188 | ± | 0.002821 | MeV |
| β- Decay Energy: | -1.800000 | ± | 0.100000 | 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: 11.9 h ( 42840 sec., λ = 1.61799×10-05 s-1)
- Mode of decay:
E.C. to
(Q = 0.803 MeV)
Branch ratio: 99.99 %
- Mode of decay:
α to
(Q = 5.924 MeV)
Branch ratio: 0.01 %
- Possible parent nuclides:
- E.C. from
- 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)
Magnetic Dipole Moments and Electric Quadrupole Moments
| Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
| ~2500 | 163 ns | (7/2+) | | (+)2.6(2) | | | | | TDPAD | PL163B 327 (85) |
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N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.
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