54-Xe-129
 basic
 fission yield
 n-XS summary
 XS graphs

 element
54-xenon-129

  • Atomic Mass: 128.9047795 +- 0.0000009 amu
  • Excess Mass: -88697.350 +- 0.813 keV
  • Binding Energy: 1087650.909 +- 0.832 keV
  • Beta Decay Energy: B- -1195.955 +- 4.592 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.
  • Atomic Percent Abundance: 26.4%
  • Spin: 1/2+
  • Stable Isotope
    Meta state at 0.236 Mev
  • Spin: 11/2-
  • Half life: 8.88 d
  • Mode of decay: IT
    • Decay energy: 0.236 MeV

  • Possible parent nuclides:
    Beta from I-129
    Electron capture from Cs-129
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
0stable1/2+ -0.777976(8) [2H]NHPAc 41 367 (68)
400.98 ns3/2+ +0.58(8) [129Xe]MEJPCo 35 C6-301 (74)
-0.41(4) [131Xe]MEPR 135 B1102 (64)
2368.89 d11/2- -0.8906(12) d [129Xe]CFBLSPC Neugart (90)
-0.891223(4) [131Xe 164]"N/OP, NO/S"PR C34 1974 (86)/ZP 267 145 (74)
0.8911(5) [133Xe]NMR/ONZP A326 255 (87)
+0.64(2) [131Xe]CFBLSPC Neugart (90)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.