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.H.; Zhou, X.; Zhou, X.H.; Xu, H.S.; Liu, M.L.; Li, J.G.; Niu, Y.F.; Huang, W.J.; Yuan, Q.; Zhang, S.; Xu, F.R.; Litvinov, Yu.; Blaum, K.; Meisel, Z.; Casten, R.F.; Cakirli, Rabia; Chen, R.J.; Deng, H.Y.; Fu, C.Y.; Ge, W.W.; Li, H.F.; Liao, T.; Litvinov, S.A.; Shuai, P.; Shi, J.Y.; Song, Y.N.; Sun, M.Z.; Wang, Q.; Xing, Y.M.; Xu, X.; Yan, X.L.; Yang, J.C.; Yuan, Y.J.; Zeng, Q.; Zhang, M.

doi:10.1103/physrevlett.130.192501

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

Atıf İçin Kopyala

Wang M., Zhang Y., Zhou X., Zhou X., Xu H., Liu M., ...Daha Fazla

Physical Review Letters, cilt.130, sa.19, 2023 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 130 Sayı: 19
Basım Tarihi: 2023
Doi Numarası: 10.1103/physrevlett.130.192501
Dergi Adı: Physical Review Letters
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, EMBASE, INSPEC, MEDLINE, zbMATH, DIALNET
İstanbul Üniversitesi Adresli: Evet

Özet

Using a novel method of isochronous mass spectrometry, the masses of Ge62, As64, Se66, and Kr70 are measured for the first time, and the masses of Zn58, Ga61, Ge63, As65, Se67, Kr71, and Sr75 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.