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１９９８年１１、１２月间，俄罗斯杜布纳核子联合研究所在进行２４４Ｐｕ（４８Ｃａ，３ｎ）２８９１１４Ｍ实验时，观察到由１１４号元素及其子、孙体１１２号、１１０号元素连续放出的３个α粒子和１０８号元素的自发裂变。令人极感兴趣的是２８９１１４Ｍ的半衰期长达３０
In November and December 1998, at the joint experiment of 244Pu (48Ca, 3n) 289114M, the Dubuana Institute of Nuclear Physics of Russia observed the continuous release of element No. 114 and its descendants No.101 and No.10 A-particles and element 108 spontaneous fission. It is very interesting that 289114M half-life of up to 30