在相互作用玻色子模型(IBM)基础上用O(6)高阶项代替传统的SU(3)四极-四极相互作用来研究原子核从振动到转动过渡区的量子相变行为.利用U(5)-SU(3)和UQ两种方案,在玻色子数分别为N=8和N=20不同情况下,研究了原子核的一些低激发态的能级比和电四极跃迁比.结果表明:随着玻色子数N的增大,系统的量子相变行为得到加强;两种方案都可以用来描述从振动到转动过渡区的原子核的量子相变特征且O(6)高阶项方案下量子相变行为更为明显.在此基础上,进一步应用这两种方案具体讨论了152Sm核的低激发态能级和电四极跃迁性质并与实验数据进行对比分析.结果表明,用O(6)高阶项可以更为合理地描述带内跃迁及不同带之间的带间跃迁性质.
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