α decay to 156Gd Believed to undergo α decay to 157Gd Believed to undergo α decay to 158Gd Can undergo [[Beta_decay#Bound-state_β−_decay|bound-state β−
四中子(英语:Tetraneutron) 自由中子 0號元素 核力 氦-2 Spyrou, A; et al. First Observation of Ground State Dineutron Decay: 16Be. Phys. Rev. Lett. 108, 102501 (2012). March 9, 2012 [2018-01-22]