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通过１１６Ｓｎ（１６Ｏ，３ｎ）１２９ Ｃｅ反应，利用多普勒移动衰减法测量了１２９Ｃｅ高自旋态的寿命．得到的跃迁四极矩表明１２９Ｃｅ的集体性相对于核芯１２８Ｃｅ减弱．这个因增加一个ｈ１１／２中子而引起集体性的降低可以解释为由于形状驱动效应产生三轴形变所造成的．正、负宇称带的跃迁四极矩与角动量的关系呈现相似的变化趋势，推测一对ｈ１１／２准质子可能对核芯性质起主要作用．
The lifetime of the 129Ce high spin state was measured by the Doppler shift decay method through the 116Sn (16O, 3n) 129 Ce reaction. The resulting transition quadrupole shows that the 129Ce collective weakens relative to the core 128Ce. This collective decrease due to the addition of one h11 / 2 neutron can be explained by the triaxial deformation caused by the shape-driven effect. The relationship between the transition quadrupole moment and angular momentum of positive and negative parity bands shows a similar trend. It is speculated that a pair of h11 / 2 quasi - protons may play a major role in the core properties.