element
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Information about Neptunium-240:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 240.056169 | ± | 0.000016 | amu |
| Excess Mass (Δ): | 52.320918 | ± | 0.015154 | MeV |
| Binding Energy: | 1812.037689 | ± | 0.015158 | MeV |
| β- Decay Energy: | 2.199599 | ± | 0.015029 | 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+)
- Half life: 61.9 min ( 3714 sec., λ = 0.000186631 s-1)
- Mode of decay:
β- to
(Q = 2.200 MeV)
Meta state at 0.000 Mev
- Spin: 1(+)
61.9
- Half life: 7.22 min ( 433.2 sec., λ = 0.00160006 s-1)
- Mode of decay:
β- to
(Q = 2.200 MeV)
Branch ratio: 99.89 %
- Possible parent nuclides:
- β- 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)
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