The structures of isomeric and collective states in neutron-rich hafnium isotopes have been investigated within the paired cranked Nilsson-Strutinsky-Bogoliubov (CNSB), and the unpaired cranked Nilsson-Strutinsky (CNS) formalisms. We show that by combining these two models, a good understanding of the formation of multiquasiparticle prolate isomers is achieved. The calculations show at angular momenta $I\ensuremath{\ge}35$, well-deformed oblate collective rotation strongly competes energetically with the prolate noncollective states. Comparison is made with experimental data, where available, and with other model calculations.

中文翻译：

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富中子铪同位素的异构和集体结构

已在成对曲柄 Nilsson-Strutinsky-Bogoliubov (CNSB) 和不成对曲柄 Nilsson-Strutinsky (CNS) 形式中研究了富含中子的铪同位素的异构体和集体态的结构。我们表明，通过结合这两个模型，可以很好地理解多准粒子扁长异构体的形成。计算表明，在角动量 $I\ensuremath{\ge}35$ 处，变形良好的扁圆集体旋转与扁长非集体状态强烈竞争。与实验数据（如果可用）和其他模型计算进行比较。