B(E2) values in 150Nd and the critical point symmetry X(5).
B(E2) values in 150Nd and the critical point symmetry X(5).
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DOI：
10.1103/physrevlett.88.232501
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发表时间：
2002-05
影响因子：
8.6
通讯作者：
R. Krücken;B. Albanna;C. Bialik;R. Casten;J. Cooper;A. Dewald;N. Zamfir;C. Barton;C. Beausang-C.-Beausa
中科院分区：
文献类型：
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作者：
R. Krücken;B. Albanna;C. Bialik;R. Casten;J. Cooper;A. Dewald;N. Zamfir;C. Barton;C. Beausang-C.-Beausa
采用132 MeV 32S束流库仑激发150Nd后的反冲距离法测量了150Nd的态寿命。实验在耶鲁大学串联加速器上进行，采用了SPEEDY伽玛射线探测器阵列和新耶鲁大学柱塞装置。将150Nd中减小的转变概率与N = 90稀土等音的相/形状转变的临界点对称X(5)的预测进行了比较。在无参数（除了尺度）X(5)预测和150Nd的低自旋能级方案之间观察到非常好的一致性，表明这是迄今为止实现X(5)对称性的最佳情况。
Lifetimes of states in 150Nd were measured using the recoil distance method following Coulomb excitation of 150Nd by a 132 MeV 32S beam. The experiment was performed at the Yale Tandem accelerator, employing the SPEEDY gamma-ray detector array and the New Yale Plunger Device. Reduced transition probabilities in 150Nd are compared to the predictions of the critical point symmetry X(5) of the phase/shape transition that occurs for the N = 90 rare earth isotones. Very good agreement was observed between the parameter-free (apart from scale) X(5) predictions and the low-spin level scheme of 150Nd, revealing this as the best case thus far for the realization of the X(5) symmetry.