61-PM-139
Atomic Mass Mass Excess
138.916757368785 amu -77.54 MeV

Level energy (MeV) Spin & parity Half-life Mode of decay Branch ratio (%) Decay energy (MeV)
Ground state (5/2)+ 4.15 M 0.05 EC 100 4.5
.189 (11/2)- 180 MS 20 IT 100 .189
.189 (11/2)- 180 MS 20 EC 4.689

Strong Gamma-rays from Decay of PM-139

Decay mode Half-life Gamma-ray energy (keV) Intensity (%)
IT 180 MS 20 188.7 39.78+- 0.08
EC 4.15 M 0.05 95.30 1.8+- 0.3
EC 4.15 M 0.05 367.80 3.5+- 0.6
EC 4.15 M 0.05 402.80 14.5+- 2.3
EC 4.15 M 0.05 463.10 4.1+- 0.7
EC 4.15 M 0.05 756.5 2.0+- 0.4
EC 4.15 M 0.05 815.80 1.13+- 0.19
EC 4.15 M 0.05 981.6 1.06+- 0.19
EC 4.15 M 0.05 1704.6 0.71+- 0.14