element
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Information about Fluorine-21:
 |  | (no NIST x-ray data) | (no NIST attenuation data) | | Wikipedia | Neutron Cross Sections | X-Ray Transitions | X-Ray Attenuation |
Mass-Energy Data:
| Atomic Mass: | 20.999949 | ± | 0.000002 | amu |
| Excess Mass (Δ): | -0.047580 | ± | 0.001801 | MeV |
| Binding Energy: | 162.504178 | ± | 0.001802 | MeV |
| β- Decay Energy: | 5.684140 | ± | 0.001802 | 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: 4.158 s ( 4.158 sec., λ = 0.166702 s-1)
- Mode of decay:
β- to
(Q = 5.684 MeV)
- 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)
Magnetic Dipole Moments and Electric Quadrupole Moments
| Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
| 0 | 4.16 s | 5/2+ | | 3.93(5) | | | | | b-NMR | HFI 78 97 (93) |
| | | | | | | | | | |
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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