element
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Information about Polonium-199:
| | | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
Atomic Mass: | 198.983595 | ± | 0.000443 | amu # |
Excess Mass (Δ): | -15.281000 | ± | 0.412000 | MeV # |
Binding Energy: | 1555.757000 | ± | 0.412000 | MeV # |
β- Decay Energy: | -6.555000 | ± | 0.354000 | 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: (3/2-)
- Half life: 5.48 min ( 328.8 sec., λ = 0.00210811 s-1)
- Mode of decay:
E.C. to
 (Q = 5.600 MeV)
Branch ratio: 92.50 %
- Mode of decay:
α to
 (Q = 6.074 MeV)
Branch ratio: 7.50 %
Meta state at 0.310 Mev
- Spin: 13/2+
5.48
- Half life: 4.17 min ( 250.2 sec., λ = 0.00277037 s-1)
- Mode of decay:
E.C. to
 (Q = 5.910 MeV)
Branch ratio: 73.50 %
- Mode of decay:
α to
 (Q = 6.384 MeV)
Branch ratio: 24.00 %
- Mode of decay: γ (IT)  (Q = 0.310 MeV)
Branch ratio: 2.50 %
- 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)
Magnetic Dipole Moments and Electric Quadrupole Moments
Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
310 | 4.2 m | 13/2+ | | 0.99(7) | | | | | NO/S | JP G17 1673 (91) |
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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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