85-At-209  basic  element

85-astatine-209 Atomic Mass: 208.9861587 +- 0.0000085 amu Excess Mass: -12893.106 +- 7.920 keV Binding Energy: 1633299.534 +- 7.925 keV Beta Decay Energy: B- -3929.000 +- 28.284 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: 5.41 h Mode of decay: Electron capture to Po-209 Branch ratio: 95.90 % Decay energy: 3.486 MeV Mode of decay: Alpha to Bi-205 Branch ratio: 4.10 % Decay energy: 5.757 MeV Possible parent nuclides: Electron capture from Rn-209 Alpha from Fr-213 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 1428 26 ns 21/2- +10.0(2) TDPAD PR C14 1023 (76) 9.5(2) TDPAD DisA 37 408C (77) 0.78(8) [211At 2641] TDPAD PL 122B 27 (83) 2429 890 ns 29/2+ 15.38(14) TDPAD HFI 34 47 (87) 1.50(15) [211At 2641] LEMS PR C43 2566 (91) 1.50(15) [211At 2641] TDPAD PL 122B 27 (83) N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.