Particle-number conserving analysis for the systematics of high-K pair-broken bands in Hf and Lu isotopes (170 ≤ A ≤ 178)
Particle-number conserving analysis for the systematics of high-K pair-broken bands in Hf and Lu isotopes (170 ≤ A ≤ 178)
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DOI：
10.1103/physrevc.80.034313
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发表时间：
2009-09
影响因子：
3.1
通讯作者：
Zhe Zhang;Y. Lei;J. Zeng
中科院分区：
文献类型：
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作者：
Zhe Zhang;Y. Lei;J. Zeng
在粒子数守恒 (PNC) 形式主义的框架内，对 Hf 和 Lu 同位素 (170{<=}A{<=}178) 中系统观察到的单准粒子和低位高 K 对断裂（多准粒子）带进行了一致分析。 PNC方法处理具有配对相互作用的曲柄壳模型，其中精确考虑了泡利阻塞效应，配对相互作用的强度由实验中结合能的奇偶差决定。通过最适合单准粒子带的实验带头能量的适当的尼尔森能级方案，可以很好地再现这些单准粒子和多准粒子带的实验惯性矩（MOI）（包括构型和频率依赖性、特征分裂等），而无需任何额外的自由参数。在大多数情况下，PNC 形式支持早期作品中的配置分配。 PNC计算还揭示了Hf和Lu同位素中低位高K对破带的实验系统性与质子和中子费米表面附近的亚壳层效应密切相关。
Within the framework of the particle-number conserving (PNC) formalism, one-quasiparticle and low-lying high-K pair-broken (multiquasiparticle) bands systematically observed in Hf and Lu isotopes (170{<=}A{<=}178) are analyzed consistently. The PNC method deals with the cranked shell model with pairing interaction, in which the Pauli blocking effects are exactly accounted for, and the pairing interaction strength is determined by the experimental odd-even difference in binding energies. With an appropriate Nilsson level scheme that best fits the experimental bandhead energies of the one-quasiparticle bands, the experimental moments of inertia (MOIs) of these one-quasiparticle and multiquasiparticle bands (including configuration and frequency dependences, signature splitting, etc.) can be well reproduced without any additional free parameter. In most cases, the PNC formalism supports the configuration assignments in earlier works. the PNC calculation also reveals that the experimental systematics of low-lying high-K pair-broken bands in Hf and Lu isotopes are intimately related to the subshell effects near the Fermi surfaces of both protons and neutrons.