56-Ba-121
 basic

 element
56-barium-121

  • Atomic Mass: 120.9244859 +- 0.0003255 amu
  • Excess Mass: -70340.913 +- 303.202 keV
  • Binding Energy: 1003159.182 +- 303.202 keV
  • Beta Decay Energy: B- -7940.000 +- 587.000 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: 5/2(+)
  • Half life: 29.5 s
  • Mode of decay: Electron capture to Cs-121
    • Decay energy: 6.800 MeV
  • Mode of decay: EC + Proton to Xe-120
    • Branch ratio: 0.02 %
    • Decay energy: 4.200 MeV

  • Possible parent nuclides:
    Electron capture from La-121
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
030 s5/2(+) +0.660(1) "[135,137Ba]"CFBLSPL 211B 272 (88)
+1.79(12) st "[135,137Ba]"CFBLSPL 211B 272 (88)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.