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Xu, Y. H. Lam, Y. H. Zhang, Y. M. Xing, Y. Sun, Yu. A. Litvinov, Y. Yamaguchi, Z. Ge","submitted_at":"2019-05-29T16:47:58Z","abstract_excerpt":"Isochronous mass spectrometry has been applied in the storage ring CSRe to measure the masses of the neutron-rich $^{\\operatorname{52-54}}$Sc and $^{54,56}$Ti nuclei. The new mass excess values $ME$($^{52}$Sc) $=$ $-40525(65)$ keV, $ME$($^{53}$Sc) $=$ $-38910(80)$ keV, and $ME$($^{54}$Sc) $=$ $-34485(360)$ keV, deviate from the Atomic Mass Evaluation 2012 by 2.3$\\sigma$, 2.8$\\sigma$, and 1.7$\\sigma$, respectively. These large deviations significantly change the systematics of the two-neutron separation energies of scandium isotopes. 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