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arXiv 1810.04427nucl-th
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用扩展的THSR波函数研究10 B核与10 Be、10 C核的配对效应

Investigation of the pairing effect in 10B nucleus compared with 10Be and 10C nuclei by using the extended THSR wave function

Qing Zhao, Zhongzhou Ren, Mengjiao Lyu, Hisashi Horiuchi, Yoshiko Kanada-En'yo, Yasuro Funaki, Gerd Röpke, Peter Schuck, Akihiro Tohsaki, Chang Xu, Taiichi Yamada, Bo Zhou

摘要:

为了研究团簇核中的核子-核子配对效应,我们构造了一个包含分子轨道和配对组态的叠加Tohsaki-Horiuchi-Schuck-Roepke(THSR)波函数.利用这个新的波函数,我们研究了T=0,S=1(等差线)的10 B的类氘pn配对效应,并与10 Be和10 C的等矢量NN对(T=1,S=1)进行了比较.计算了~(10)Be、~(10)B和~(10)C核的基态和~(10)B的1+激发态的能量。这些能量与使用以前版本的THSR波函数的研究相比有了本质的提高。此外,总波函数和配对分量之间的重叠表明,NN配对效应在10 B中比在10 Be和10 C中更明显。通过分析能量和波函数分量之间的重叠,我们观察到两种不同的机制,促进10 B中类氘对的形成。我们还讨论了配对效应,给出了每个核中组分之间的平均距离和价核子的密度分布。

英文摘要:

In order to study the nucleon-nucleon pairing effects in clustering nuclei, we formulate a superposed Tohsaki-Horiuchi-Schuck-Roepke (THSR) wave function, which includes both molecular-orbit and pairing configurations explicitly. With this new wave function, we investigate the abnormal deuteron-like pn-pairing effect in 10B with T=0 and S=1 (isoscalar) by comparing with isovector NN pairs (T=1, S=1) in 10Be and 10C. Energies are calculated for the ground states of 10Be, 10B and 10C nuclei, and the 1+ excited state of 10B. These energies are essentially improved comparing with studies using previous version of THSR wave function. Further more, overlaps between the total wave function and the pairing component indicate that the NN pairing effect is more visible in 10B than in 10Be and 10C. By analyzing the energies and the overlaps between wave function components, we observe two different mechanisms enhancing the formation of deuteron-like pairs in 10B. We also discuss the pairing effect by showing average distances between components in each nucleus and density distributions of valance nucleons.

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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