99-Es-254  basic  n-XS summary  XS graphs  element

99-einsteinium-254 Atomic Mass: 254.0880160 +- 0.0000047 amu Excess Mass: 81986.388 +- 4.388 keV Binding Energy: 1890676.618 +- 4.402 keV Beta Decay Energy: B- 1088.200 +- 3.202 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+) Half life: 275.7 d Mode of decay: Alpha to Bk-250 Decay energy: 6.618 MeV Mode of decay: Electron capture to Cf-254 Branch ratio: <0.00010 % Decay energy: 0 0.654 MeV Mode of decay: SF Branch ratio: <3.0E-6 % Mode of decay: Beta to Fm-254 Branch ratio: 1.7E-6 % Decay energy: 1.090 MeV Meta state at 0.078 Mev Spin: 2+ Half life: 39.3 h Mode of decay: Beta to Fm-254 Branch ratio: 98.00 % Decay energy: 1.168 MeV Mode of decay: IT to Es-254 Branch ratio: <3.00 % Decay energy: 0.078 MeV Mode of decay: Alpha to Bk-250 Branch ratio: 0.33 % Decay energy: 6.696 MeV Mode of decay: Electron capture to Cf-254 Branch ratio: 0.08 % Decay energy: 0.732 MeV Mode of decay: SF Branch ratio: <0.05 % Possible parent nuclides: Alpha from Md-258 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 78 39.3 h 2+ 2.90(7) [253Es] AB PR A11 499 (75) 3.7(5) st [253Es] AB PR A11 499 (75) N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.