61-promethium-157

Atomic Mass: 156.9332000 +- 0.0003200 amu #
Excess Mass: -62224.000 +- 298.000 keV #
Binding Energy: 1281698.000 +- 298.000 keV #
Beta Decay Energy: B- 4514.000 +- 302.000 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: 10.56 s
Mode of decay: Beta to Sm-157
- Decay energy: 4.500 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)