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arXiv 2302.11237nucl-th
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对$^{180}$Hg、$^{236}$U和$^{256}$Fm裂变路径上量子壳效应的Hartree-Fock-Bogoliubov研究

Hartree-Fock-Bogoliubov study of quantum shell effects on the path to fission in $^{180}$Hg, $^{236}$U and $^{256}$Fm

Rémi Bernard, Cédric Simenel, Guillaume Blanchon

AI总结:

本文用约束Hartree-Fock-Bogoliubov方法研究$^{180}$Hg、$^{236}$U和$^{256}$Fm裂变中的量子壳效应,揭示其驱动不对称裂变及碎片预形成的作用。

摘要:

稳定具有各种形状裂变碎片的量子壳效应被认为是决定断点处核子在碎片间分布的一个因素。壳效应还会在最终碎片(预)形成之前,使原子核在走向裂变的过程中产生不对称形状。本文利用Gogny相互作用的D1S参数化,通过约束Hartree-Fock-Bogoliubov计算,研究了$^{180}$Hg、$^{236}$U和$^{256}$Fm裂变中的这些壳效应。计算了Strutinsky壳能修正和费米面附近的单粒子能级密度。若干中子和质子壳效应被确定为推动不对称裂变的驱动因素。壳效应还被用于识别裂变后期碎片的预形成。

英文摘要:

Quantum shell effects stabilising fission fragments with various shapes have been invoked as a factor determining the distribution of nucleons between the fragments at scission. Shell effects also induce asymmetric shapes in the nucleus on its way to fission well before the final fragments are (pre)formed. These shell effects are studied in fission of $^{180}$Hg, $^{236}$U and $^{256}$Fm with constrained Hartree-Fock-Bogoliubov calculations using the D1S parametrisation of the Gogny interaction. Strutinsky shell energy correction and single-particle energy level density near the Fermi surface are computed. Several neutron and proton shell effects are identified as drivers towards asymmetric fission. Shell effects are also used to identify the preformation of the fragments in the later stage of fission.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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