57-lanthanum-136

Atomic Mass: 135.9076512 +- 0.0000752 amu
Excess Mass: -86022.358 +- 70.063 keV
Binding Energy: 1139128.116 +- 70.064 keV
Beta Decay Energy: B- 472.833 +- 84.731 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: 1+
Half life: 9.87 min
Mode of decay: Electron capture to Ba-136
- Decay energy: 2.870 MeV
Meta state at 0.230 Mev
Half life: 114 ms
Mode of decay: IT
- Decay energy: 0.230 MeV

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)