arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.00409nucl-th
收藏

多$Λ$超核的球相对论平均场研究

A Study of Multi$Λ$ hypernuclei within Spherical Relativistic Mean-field Approach

Asloob A. Rather, M. Ikram, A. A. Usmani, Bharat Kumar, S. K. Patra

摘要:

这篇研究文章是M. Ikram等人,在International Journal of Modern Physics E { \bf{25} },1650103(2016)中报道,其中我们在实验证实的轻到重质量区域(即,重质量区域)的双幻数核子核中搜索$Λ$幻数。$^{16}O - ^{208}Pb$)通过注射$Λ$。本文在相对论平均场理论的框架下,利用预测的双幻核,考虑了超核中的$ΛN$和$ΛΛ$相互作用。$^{292}$ 120、$^{304}$ 120、$^{360}$ 132、$^{370}$ 132、$^{336}$ 138、$^{396}$ 138具有难以捉摸的超重质量区。类比于传统核理论中已建立的磁性特征,在多$Λ$超核中,基于一、二$Λ$分离能($S_Λ, S_{2Λ}$)和两个λ壳层能隙($δ_{2Λ}$)对超核磁性进行了预言.计算结果表明,PDMATHAMN数92、106、126、138、184、198、240和258可能是在难以捉摸的超重核子核中引入PDMATHAMN后的PDMATHAMN壳层封闭。此外,为了支持$Λ$壳层闭合,还研究了$Λ$对能和有效$Λ$对隙。除了各种相对论和非相对论理论研究所预测的核子壳外,新的λ壳闭包的出现可以归因于超核中与正常核相比相对较弱的自旋轨道耦合强度。

英文摘要:

This research article is a follow up of earlier work by M. Ikram et al., reported in International Journal of Modern Physics E {\bf{25}}, 1650103 (2016) wherein we searched for $Λ$ magic numbers in experimentally confirmed doubly magic nucleonic cores in light to heavy mass region (ie.$^{16}O - ^{208}Pb$) by injecting $Λ$'s into them. In present manuscript, working within the state-of-art relativistic mean field theory with inclusion of $ΛN$ and $ΛΛ$ interaction in hypernuclei using the predicted doubly magic nucleonic cores ie. $^{292}$120, $^{304}$120, $^{360}$132, $^{370}$132, $^{336}$138, $^{396}$138 of elusive superheavy mass regime. In analogy to well established signatures of magicity in conventional nuclear theory, the prediction of hypernuclear magicity are made on the basis of one-, two-$Λ$ separation energy ($S_Λ, S_{2Λ}$) and two lambda shell gaps ($δ_{2Λ}$) in multi-$Λ$ hypernuclei. The calculations suggest that the $Λ$ numbers 92, 106, 126, 138, 184, 198, 240, and 258 might be the $Λ$ shell closures after introducing the $Λ$'s in elusive superheavy nucleonic cores. Moreover, in support of $Λ$ shell closure the investigation of $Λ$ pairing energy and effective $Λ$ pairing gap has also been made. The appearance of new lambda shell closures other than the nucleonic ones predicted by various relativistic and non-relativistic theoretical investigations can be attributed to the relatively weak strength of spin-orbit coupling in hypernuclei compared to normal nuclei.

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。

↑