gammas, %yeild Th234 - 24.2 day t 1/2 63.29 - 4.8 (0.7) 92.38 - 2.8 (0.3) 92.8 - 2.8 (0.3) Pa234m - 1.1 min t 1/2 766.32 - 0.294 (0.012) 1001 - 0.837 (0.01)