87-Fr-221
basic
element
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87-francium-221
- Atomic Mass: 221.0142457 +- 0.0000081 amu
- Excess Mass: 13269.739 +- 7.530 keV
- Binding Energy: 1702427.855 +- 7.536 keV
- Beta Decay Energy: B- 314.745 +- 9.358 keV
"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.
- Spin: 5/2-
- Half life: 4.9 min
- Mode of decay: Alpha to At-217
- Mode of decay: Beta to Ra-221
- Branch ratio: <0.10 %
- Decay energy: 0.312 MeV
- Mode of decay: 14C
- Branch ratio: 9E-13 %
- Decay energy: 0.312 MeV
- Possible parent nuclides:
- Beta from Rn-221
- Alpha from Ac-225
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 | 4.8 m | 5/2- | | +1.58(3) | | | | [211Fr] | CFBLS | EPL 3 175 (87) |
| | | | +1.58(3) | | | | [211Fr] | ABLS | PL 163B 66 (85) |
| | | | | | -0.98(6) st | | | "ABLS, R" | PL 163B 66 (85)/NP A468 1 (87) |
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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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