100-FM-251
Atomic Mass Mass Excess
251.081566828438 amu 75.979 MeV

Level energy (MeV) Spin & parity Half-life Mode of decay Branch ratio (%) Decay energy (MeV)
Ground state (9/2-) 5.30 H 0.08 EC 98.2 0
Ground state (9/2-) 5.30 H 0.08 A 1.8 7.425

Strong Gamma-rays from Decay of FM-251

Decay mode Half-life Gamma-ray energy (keV) Intensity (%)
EC 5.30 H 0.08 8.3 98.20+- 0.13
EC 5.30 H 0.08 349.90 0.82+- 0.04
EC 5.30 H 0.08 405.60 0.99+- 0.05
EC 5.30 H 0.08 453.10 1.45+- 0.08
EC 5.30 H 0.08 833.30 0.63+- 0.04
EC 5.30 H 0.08 880.80 2.19+- 0.11