element
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Information about Lawrencium-257:
 |  |  | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Contribution from TON user: Jag Tuli (tuli@bnlnd2.dne.bnl.gov)
For 257Lr there should be no SF branch.
3 Dec 1999
Mass-Energy Data:
| Atomic Mass: | 257.099606 | ± | 0.000223 | amu # |
| Excess Mass (Δ): | 92.782000 | ± | 0.207000 | MeV # |
| Binding Energy: | 1900.965000 | ± | 0.207000 | MeV # |
| β- Decay Energy: | -3.229000 | ± | 0.337000 | 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: (9/2+)
- Half life: 0.646 s ( 0.646 sec., λ = 1.07298 s-1)
- Mode of decay:
α to
(Q = 9.010 MeV)
- Mode of decay: SF
(Q = 9.010 MeV)
Branch ratio: <0.0065 %
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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