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质量数A=130附近的轻稀土核处在形变区,具有容易产生三轴形变的特点。对该质量区偶Ce同位素高自旋态的寿命测量表明,这些核的约化跃迁几率B（E2）随自旋增大而减小,并在回弯区达到最小[1～3]。包括粒子-转子模型在内的一些理论计算[4,5]都能很好地描述这些核的回弯特性,并成功地预言了B（E2）在回弯附近出现最小值。然而,130Ce却在12+态显示出异常高的B（E2）值[6]。这一现象令人无法理解,任何理论计算都不能再现这个极高B（B）值,这向核结构理论提出了挑战。因此,重新测量这个核回弯区的能级寿命,澄清这一异常
The mass of rare earths around the mass A = 130 is located in the deformation zone, which has the feature of easy triaxial deformation. Lifetime measurements of the high spin states of Ce isotopes in this mass region show that the reduced transition probability B (E2) of these nuclei decreases with increasing spin and reaches the minimum in the bendback region [1-3]. Some theoretical calculations, including the particle-rotor model, [4,5] describe the bend-back characteristics of these nuclei very well and have successfully predicted the minimum value of B (E2) near the bend-back. However, 130Ce showed abnormally high B (E2) values in the 12+ state [6]. This phenomenon is incomprehensible, and any theoretical calculation can not reproduce this extremely high value of B (B), posing a challenge to nuclear structure theory. Therefore, to re-measure the energy level of this bend back to bend life, to clarify this anomaly