Basic Info

Fission Yield

n-XS summary


element
Information about Iodine-129:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

Iodine-129 is used to check some radioactivity counters in vitro diagnostic testing laboratories.
    Mass-Energy Data:

    Atomic Mass:128.904987±0.000004amu
    Excess Mass (Δ):-88.503573±0.003400MeV
    Binding Energy:1088.239485±0.003405MeV
    β- Decay Energy:0.193777±0.003390MeV
"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:

  • Spin: 7/2+
  • Half life: 15700000 years ( 4.95178×10+14 sec., λ = 1.39979×10-15 s-1)
  • Mode of decay:
    β-
    to
    129
    54
    Xe
      (Q = 0.194 MeV)

  • Possible parent nuclides:
    β- from
    129
    52
    Te
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
01.6x10*7 y7/2+ +2.6210(3) [2H]NPR 82 97 (51)
-0.482(10) [127I]"Q, MA, R"PR 90 609 (53)/PR B61 13588 (00)
2816.8 ns5/2+ +2.805(3) [129I]MEPL 106B 457 (79)
-0.42(2) MEJP B20 5595 (87)
-0.598(13) [129I]"ME, R"NIM 105 509 (72)/PR B61 13588 (00)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.