58-CE-139
Atomic Mass Mass Excess
138.906646727815 amu -86.958 MeV

Level energy (MeV) Spin & parity Half-life Mode of decay Branch ratio (%) Decay energy (MeV)
Ground state 3/2+ 137.640 D 0.023 EC 100 .278
.754 11/2- 56.54 S 0.13 IT 100 .754

Strong Gamma-rays from Decay of CE-139

Decay mode Half-life Gamma-ray energy (keV) Intensity (%)
EC 137.640 D 0.023 165.853 79.886+-0.015
IT 56.54 S 0.13 754.24 92.45