Basic Info

n-XS summary


element
Information about Uranium-238:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:238.050783±0.000002amu
    Excess Mass (Δ):47.303664±0.001980MeV
    Binding Energy:1801.694651±0.002006MeV
    β- Decay Energy:-0.147065±0.001145MeV
"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.
Radioactive Decay Data:

  • Atomic Percent Abundance: 99.2745%
  • Spin: 0+
  • Half life: 4.468E+9 years ( 1.40921×10+17 sec., λ = 4.9187×10-18 s-1)
  • Mode of decay:
    α
    to
    234
    90
    Th
      (Q = 4.270 MeV)
  • Mode of decay: SF   Branch ratio: 0.00005 %

  • Possible parent nuclides:
    β- from
    238
    91
    Pa
    α from
    242
    94
    Pu
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)T1/2Spin    m(nm)    Q(b)    Ref. Std.MethodReference
gsband g(18-24)>g(10-16) TFPRL 48 383 (82)
g(av)=0.37(2)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.