87-Fr-207  basic  element

87-francium-207 Atomic Mass: 206.9968594 +- 0.0001240 amu Excess Mass: -2925.464 +- 115.500 keV Binding Energy: 1605624.539 +- 115.500 keV Beta Decay Energy: B- -6397.000 +- 431.000 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: 9/2- Half life: 14.8 s Mode of decay: Alpha to At-203 Branch ratio: 95.00 % Decay energy: 6.900 MeV Mode of decay: Electron capture to Rn-207 Branch ratio: 5.00 % Decay energy: 5.710 MeV Possible parent nuclides: Alpha from Ac-211 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 14.8 s 9/2- +3.89(8) [211Fr] ABLS PL 163B 66 (85) -0.16(5) st ABLS PL 163B 66 (85) N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.