Mass Measurement of Upper fp-Shell N = Z-2 and N = Z-1 Nuclei and the Importance of Three-Nucleon Force along the N = Z Line

被引：40

作者：

Wang, M. ^{[1
,2
]}

Zhang, Y. H. ^{[1
,2
]}

Zhou, X. ^{[1
,2
]}

Zhou, X. H. ^{[1
,2
]}

Xu, H. S. ^{[1
,2
]}

Liu, M. L. ^{[1
]}

Li, J. G. ^{[1
]}

Niu, Y. F. ^{[3
,4
]}

Huang, W. J. ^{[1
,5
]}

Yuan, Q. ^{[6
]}

Zhang, S. ^{[6
]}

Xu, F. R. ^{[6
]}

Litvinov, Yu. A. ^{[1
,7
]}

Blaum, K. ^{[8
]}

Meisel, Z. ^{[9
]}

Casten, R. F. ^{[10
]}

Cakirli, R. B. ^{[11
]}

Chen, R. J. ^{[1
,7
]}

Deng, H. Y. ^{[1
]}

Fu, C. Y. ^{[1
]}

Ge, W. W. ^{[1
]}

Li, H. F. ^{[1
,2
]}

Liao, T. ^{[1
,2
]}

Litvinov, S. A. ^{[1
,7
]}

Shuai, P. ^{[1
]}

Shi, J. Y. ^{[1
,2
]}

Song, Y. N. ^{[1
,2
]}

Sun, M. Z. ^{[1
]}

Wang, Q. ^{[1
,2
]}

Xing, Y. M. ^{[1
]}

Xu, X. ^{[1
]}

Yan, X. L. ^{[1
]}

Yang, J. C. ^{[1
,2
]}

Yuan, Y. J. ^{[1
,2
]}

Zhang, Q. ^{[12
]}

Zhang, M. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China

[3] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[4] Lanzhou Univ, Frontiers Sci Ctr Rare isotope, Lanzhou 730000, Peoples R China

[5] Adv Energy Sci & Technol Guangdong Lab, Huizhou 516007, Peoples R China

[6] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[7] GSI Helmholtzzentrum Schwerionenforsch, Planckstr 1, D-64291 Darmstadt, Germany

[8] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[9] Ohio Univ, Inst Nucl & Particle Phys, Dept Phys & Astron, Athens, OH 45701 USA

[10] Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA

[11] Istanbul Univ, Dept Phys, TR-34134 Istanbul, Turkiye

[12] East China Univ Technol, Sch Nucl Sci & Engn, Nanchang 330013, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 19期

基金：

国家重点研发计划; 欧洲研究理事会;

关键词：

GROUND-STATE MASSES; SPECTROMETRY; CHARGE; DEFORMATIONS;

D O I：

10.1103/PhysRevLett.130.192501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a novel method of isochronous mass spectrometry, the masses of 62Ge, 64As, 66Se, and 70Kr are measured for the first time, and the masses of 58Zn, 61Ga, 63Ge,65As, 67Se, 71Kr, and 75Sr are redetermined with improved accuracy. The new masses allow us to derive residual proton-neutron interactions (5Vpn) in the N = Z nuclei, which are found to decrease (increase) with increasing mass A for even-even (odd-odd) nuclei beyond Z = 28. This bifurcation of 5Vpn cannot be reproduced by the available mass models, nor is it consistent with expectations of a pseudo-SU(4) symmetry restoration in the fp shell. We performed ab initio calculations with a chiral three-nucleon force (3NF) included, which indicate the enhancement of the T =1 pn pairing over the T = 0 pn pairing in this mass region, leading to the opposite evolving trends of 5Vpn in even-even and odd-odd nuclei.

引用

页数：6

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