86-Rn-221  basic  element

86-radon-221 Atomic Mass: 221.0154550 +- 0.0001080 amu # Excess Mass: 14396.000 +- 100.000 keV # Binding Energy: 1702084.000 +- 100.000 keV # Beta Decay Energy: B- 1127.000 +- 100.000 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: 7/2(+) Half life: 25 min Mode of decay: Beta to Fr-221 Branch ratio: 78.00 % Decay energy: 1.220 MeV Mode of decay: Alpha to Po-217 Branch ratio: 22.00 % Decay energy: 6.146 MeV 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 25 m (7/2+) -0.020(1) [209Rn] CFBLS PRL 60 2133 (88) -0.38(4) "CFBLS, R" Bk88 NFFS 126 (88) -0.47(5) CFBLS CERN EP/87-15 (87) N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.