Description of collective and quasiparticle excitations in deformed actinide nuclei: The first application of the multishell shell model for heavy nuclei
Description of collective and quasiparticle excitations in deformed actinide nuclei: The first application of the multishell shell model for heavy nuclei
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变形锕系原子核中集体和准粒子激发的描述：重核多壳层模型的首次应用
DOI：
10.1103/physrevc.90.014321
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发表时间：
2014-03
影响因子：
3.1
通讯作者：
Gao, Zao-Chun
中科院分区：
文献类型：
--
作者：
Chen, Fang-Qi;Sun, Yang;Wu, Cheng-Li;Gao, Zao-Chun
重壳模型[Y.Sun和C.L.Wu，Phys.Rev.C68,024315(2003年)]是为了利用现有的两种模型的优点，即投影壳模型和费米子动力学对称模型。为了构造HSM，人们通过将集合$D$对添加到内在基础中来扩展PSM。HSM有望同时描述变形核中的低位集体激发和准粒子激发，即使对于最重的系统，HSM仍然保持模型空间的易操纵性。作为HSM的第一个数值实现，我们系统地研究了一些形变鳗系核的能带结构，模型空间包括多达4个准粒子和1-$D对组态。计算的基态能带、集体能带、伽马能带和某些准粒子能带的能级与已知的实验数据符合得很好。预测了一些低位准粒子带，等待实验证实。
The heavy shell model (HSM) [Y. Sun and C.-L. Wu, Phys. Rev. C 68, 024315 (2003)] was proposed to take the advantages of two existing models, the projected shell model (PSM) and the fermion dynamical symmetry model (FDSM). To construct the HSM, one extends the PSM by adding collective $D$ pairs into the intrinsic basis. The HSM is expected to describe simultaneously low-lying collective and quasiparticle excitations in deformed nuclei, and still keeps the model space tractable even for the heaviest systems. As the first numerical realization of the HSM, we study systematically the band structures for some deformed actinide nuclei, with a model space including up to 4-quasiparticle and 1-$D$-pair configurations. The calculated energy levels for the ground-state bands, the collective bands such as $\ensuremath{\beta}$ and $\ensuremath{\gamma}$ bands, and some quasiparticle bands agree well with known experimental data. Some low-lying quasiparticle bands are predicted, awaiting experimental confirmation.
DOI：
10.1063/1.2810324
发表时间：
1990-04
影响因子：
1.3
作者：
R. Casten;S. Moszkowski
通讯作者：
R. Casten;S. Moszkowski