64-GD-157
Atomic Mass Mass Excess
156.923956557396 amu -70.834 MeV

Level energy (MeV) Spin & parity Half-life Mode of decay Branch ratio (%) Decay energy (MeV)
Ground state 3/2- STABLE 0
.426 11/2- 18.5 US 2.3 IT 100 .426

Strong Gamma-rays from Decay of GD-157

Decay mode Half-life Gamma-ray energy (keV) Intensity (%)
IT 18.5 US 2.3 9.0 1.1+- 0.6
IT 18.5 US 2.3 51 3.80+- 0.14
IT 18.5 US 2.3 55 4.80+- 0.18
IT 18.5 US 2.3 64 18.+- 3.
IT 18.5 US 2.3 65 6.9+- 1.9
IT 18.5 US 2.3 76 7.5+- 1.3
IT 18.5 US 2.3 95 9.4+- 1.3
IT 18.5 US 2.3 116 1.3+- 0.7
IT 18.5 US 2.3 131 0.6+- 0.4
IT 18.5 US 2.3 171 6.9+- 1.3
IT 18.5 US 2.3 199 30.0+- 1.7
IT 18.5 US 2.3 245 61.+- 4.