74-W-166
Atomic Mass Mass Excess
165.955019564028 amu -41.899 MeV

Level energy (MeV) Spin & parity Half-life Mode of decay Branch ratio (%) Decay energy (MeV)
Ground state 0+ 18.8 S 0.4 EC 99.97 4.2
Ground state 0+ 18.8 S 0.4 A .04 4.857

Strong Gamma-rays from Decay of W-166

Decay mode Half-life Gamma-ray energy (keV) Intensity (%)
EC 18.8 S 0.4 97.6 0.62+- 0.09
EC 18.8 S 0.4 125.80 32.+- 3.
EC 18.8 S 0.4 172.5 1.9+- 0.3
EC 18.8 S 0.4 224.60 2.5+- 0.3
EC 18.8 S 0.4 270.10 0.75+- 0.09
EC 18.8 S 0.4 395.9 1.8+- 0.5