Band structure of 235U
Band structure of 235U
复制标题
235U的能带结构
DOI：
10.1103/physrevc.86.064319
复制
发表时间：
2012
影响因子：
3.1
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
D. Ward;et al.
在几年的时间里，我们在劳伦斯伯克利国家实验室的88英寸回旋加速器上进行了三次独立的实验，其中U（厚靶）是库仑激发的。该计划包括使用γ射线和使用8pi谱仪进行的720 MeV γ射线束的独立实验，以及使用184 MeV Ca射线束的CHICO γ射线实验。除了将已知的负宇称带扩展到高自旋，我们还在一些七个正宇称带中分配了能级，这些带在某些情况下（例如，和）强烈填充的激发。对CHICO数据进行了分析，从观测到的产率中提取了矩阵元素.此外，还可以从射线分支比中提取出许多矩阵元素。出现了许多新的特征，包括在相同的Nilsson多重态之间的磁跃迁的意外衰减，在高自旋的科里奥利交错的崩溃，以及集体对科里奥利相互作用的影响。
Over a period of several years we have performed three separate experiments at Lawrence Berkeley National Laboratory's 88-Inch Cyclotron in whichU (thick target) was Coulomb-excited. The program involved stand-alone experiments with Gammmasphere and with the 8pi Spectrometer usingXe beams at 720 MeV, and a CHICO-Gammasphere experiment with aCa beam at 184 MeV. In addition to extending the known negative-parity bands to high spin, we have assigned levels in some seven positive-parity bands which are in some cases (e.g.,,, and) strongly populated byexcitation. The CHICO data have been analyzed to extractandmatrix elements from the observed yields. Additionally, manymatrix elements could be extracted from the-ray branching ratios. A number of new features have emerged, including the unexpected attenuation of magnetic transitions between states of the same Nilsson multiplet, the breakdown of Coriolis staggering at high spin, and the effect ofcollectivity on Coriolis interactions.