Mass Measurement of Upper fp -Shell N=Z<mml:-猫眼课题宝

DOI：

10.1103/physrevlett.130.192501

发表时间：

2023-05

期刊：

Physical Review Letters

影响因子：

8.6

通讯作者：

中科院分区：

物理与天体物理1区

文献类型：

作者：

M. Wang;Y. H. Zhang-Y. H.-Zhang-2124817770;X. Zhou;X. H. Zhou-X. H.-Zhou-2125583035;H. S. Xu-H. S.-Xu-2218541310;Meilin Liu;J. G. Li-J. G.-Li-2109588676;Y. Niu;W. J. Huang-W. J.-Huang-2126957050;Q. Yuan;S. Zhang;F. Xu;Yu. A. Litvinov;K. Blaum;Z. Meisel;R. Casten;R. Cakirli;R. J. Chen-R. J.-Chen-2241211457;H. Deng;C. Fu;W. Ge;H. F. Li-H. F.-Li-2162729369;T. Liao;S. Litvinov;P. Shuai;J. Y. Shi-J. Y.-Shi-2216983178;Y. Song;M. Sun;Q. Wang;Y. Xing;X. Xu;X. L. Yan-X. L.-Yan-2217018964;J. C. Yang-J. C.-Yang-2299840979;Y. J. Yuan-Y. J.-Yuan-2218694046;Q. Zeng;M. Zhang

使用一种新的同位素质谱法，首次测量了、、和的质量，并以更高的精度重新测定了、和的质量。新的质量使我们能够推导出核中剩余的质子-中子相互作用（），发现对于偶数-偶数（奇数-奇数）核，它随着质量的增加而减少（增加）。这种分叉不能用现有的质量模型再现，也不符合在壳层中伪SU（4）对称性恢复的预期。我们进行了包含手征三核子力（3 NF）的从头算计算，结果表明在这个质量区域内，配对比配对增强，导致偶-偶核和奇-奇核的演化趋势相反.

Using a novel method of isochronous mass spectrometry, the masses of,,, andare measured for the first time, and the masses of,,,,,, andare redetermined with improved accuracy. The new masses allow us to derive residual proton-neutron interactions () in thenuclei, which are found to decrease (increase) with increasing massfor even-even (odd-odd) nuclei beyond. This bifurcation ofcannot be reproduced by the available mass models, nor is it consistent with expectations of a pseudo-SU(4) symmetry restoration in theshell. We performedab initiocalculations with a chiral three-nucleon force (3NF) included, which indicate the enhancement of thepairing over thepairing in this mass region, leading to the opposite evolving trends ofin even-even and odd-odd nuclei.

Mass Measurement of Upper fp -Shell N=Z<mml:

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