偶偶校高自族态的微观研究（Ⅱ）对同中子异荷素^（154）Dy、^（156）Er和^（158）Yb的应用

Microscopic Investigation of High-Spin States for Even-Even Nuclei(Ⅱ) Application to isotones ￣(154)Dy,￣(156)Er and￣(158)Yb

从包括对力、四极对力及四极力的核子－核子有效相互作用出发，依据以广义的Ｄｙｓｏｎ展开方法所建立的微观理论方案，对同中子异荷素１５４Ｄｙ、１５６Ｅｒ和１５８Ｙｂ的低能态及高自旋态进行了研究．实际计算时，低能态及高自旋态分别用（ｓｄ）Ｎ组态及（ｓｄ）Ｎ－１加两中子组态描述，且取用了统一的参数值．计算结果与实验符合较好，特别是理论较好地复现了原子核的第一个回弯．

With the effective interactions consisting of a pairing force,a quadrupole pairing force and a quadrupole-quadrupole force among valence nucleons,the microscopic approach based on the generalized Dyson expansion theory is applied in studying both the low-lying and high spin states for the isotones 154Dy,156Er and 158Yb.In the truncated state space,the configurations(sd)N and (sd)N-1,+neutron-pair are assumed,respectively,for the low-lying and high spin states,although the same values of strength parameters are taken in the numerical calculations in the two subspaces.The calculated results are in good agreement with experiment,especially the data of first backbendings are reproduced satisfactorily.