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  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

Wang, M., Zhang, Y., Zhou, X., Zhou, X., Xu, H., Liu, M., et al. (2023). 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. Physical Review Letters, 130(19): 192501. doi:10.1103/PhysRevLett.130.192501.

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Wang, M., Author
Zhang, Y. H., Author
Zhou, X., Author
Zhou, X. H., Author
Xu, H. S., Author
Liu, M. L., Author
Li, J. G., Author
Niu, Y. F., Author
Huang, W. J., Author
Yuan, Q., Author
Zhang, S., Author
Xu, F. R., Author
Litvinov, Yu. A., Author
Blaum, K.1, Author           
Meisel, Z., Author
Casten, R. F., Author
Cakirli, R. B., Author
Chen, R. J., Author
Deng, H. Y., Author
Fu, C. Y., Author
Ge, W. W., AuthorLi, H. F., AuthorLiao, T., AuthorLitvinov, S. A., AuthorShuai, P., AuthorShi, J. Y., AuthorSong, Y. N., AuthorSun, M. Z., AuthorWang, Q., AuthorXing, Y. M., AuthorXu, X., AuthorYan, X. L., AuthorYang, J. C., AuthorYuan, Y. J., AuthorZeng, Q., AuthorZhang, M., Author more..
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              

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 MPINP: Präzisionsexperimente - Abteilung Blaum
 Abstract: 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 (δVpn) 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 δVpn 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 δVpn in even-even and odd-odd nuclei.

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 Dates: 2023-05-09
 Publication Status: Published online
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 Identifiers: DOI: 10.1103/PhysRevLett.130.192501
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 130 (19) Sequence Number: 192501 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1