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在30MeV／u40Ar＋159Tb反应中测量了热核碎裂成三块差不多大小的碎片的出射道．这种碎裂可能有两种模式：一种是接续的两体过程，如跟随裂变和级联裂变；另一种是瞬发的三重碎裂（3F）．从实验上区分了这两种模式并特别关注其中具有集体多轴形变的3F模式，对3F中的碎片质量分布和最可几碎片质量比进行拟合后找出了通用规律．用碎片发射平面的定向角分布来测量碰撞参数，从而将中心碰撞的3F事件与跟随准弹性散射或深部非弹性散射后的裂变事件分开．
In the 30MeV / u40Ar + 159Tb reaction, the exiting lanes of fragmented thermonuclear nuclei into three pieces were measured. There are two possible modes of this fragmentation: one is the succession of two-body processes such as following fission and cascading fission; and the other is an instant triplet fragmentation (3F). The two modes are experimentally distinguished and the 3F mode with collective multi-axis deformation is especially concerned. The general rule is found after fitting the mass fraction of 3F to the mass fraction of the most fragile fragment. Collision parameters were measured using the directional angular distribution of the fragment emission plane to separate the 3F event of central collision from the fission event following either quasi-elastic scattering or deep inelastic scattering.