Actually Gd-146 should be with letter code I and Gd-149 should be with letter code V, Gd-146 has a ~48 day half life while Gd-149 has a ~9 day half life 110.20.138.147 ( talk) 10:54, 7 December 2017 (UTC)
Actually Gd-146 should be with letter code I and Gd-149 should be with letter code V, Gd-146 has a ~48 day half life while Gd-149 has a ~9 day half life 110.20.138.147 ( talk) 10:54, 7 December 2017 (UTC)