Masses of the Tz = −3/2 nuclei 27P and 29S

Fu, C. Y.; Zhang, Y. H.; Zhou, X. H.; Wang, M.; Litvinov, Yu. A.; Blaum, K.; Xu, H. S.; Xu, X.; Shuai, P.; Lam, Y. H.; Chen, R. J.; Yan, X. L.; Bao, T.; Chen, X. C.; Chen, H.; He, J. J.; Kubono, S.; Liu, D. W.; Mao, R. S.; Ma, X. W.; Sun, M. Z.; Tu, X. L.; Xing, Y. M.; Zhang, P.; Zeng, Q.; Zhou, X.; Zhan, W. L.; Litvinov, S.; Audi, G.; Uesaka, T.; Yamaguchi, Y.; Yamaguchi, T.; Ozawa, A.; Sun, B. H.; Sun, Y.; Xu, F. R.

doi:10.1103/PhysRevC.98.014315

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Masses of the T_z = −3/2 nuclei ²⁷P and ²⁹S

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Blaum, K.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

Chen, X. C.
Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Tu, X. L.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China;
Joint Research Center for Modern Physics and Clean Energy, South China Normal University, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China;

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Zitation

Fu, C. Y., Zhang, Y. H., Zhou, X. H., Wang, M., Litvinov, Y. A., Blaum, K., et al. (2018). Masses of the T_z = −3/2 nuclei ²⁷P and ²⁹S. Physical Review C, 98(1): 014315. doi:10.1103/PhysRevC.98.014315.

Zitierlink: https://hdl.handle.net/21.11116/0000-0001-B526-8

Zusammenfassung

Isochronous mass spectrometry has been applied in the storage ring CSRe to measure the masses of the Tz=−3/2 nuclei ²⁷ P and ²⁹ S. The new mass excess value ME(²⁹ S)=−3094(13)keV is 66(52) keV larger than the result of the previous ³² S(³ He, ⁶ He) ²⁹ S reaction measurement in 1973 and a factor of 3.8 more precise. The new result for ²⁹ S together with those of the T=3/2 isobaric analog states in ²⁹ P, ²⁹ Si, and ²⁹ Al fit well into the quadratic form of the isobaric multiplet mass equation (IMME). The mass excess of ²⁷ P has been remeasured to be ME(²⁷ P)=−685(42)keV. By analyzing the linear and quadratic coefficients of the IMME in the T_z =−3/2 sd-shell nuclei, it was found that the ratio of the Coulomb radius parameters is R≈0.96 and is nearly the same for all T=3/2 isospin multiplets. Such a nearly constant R value, apparently valid for the entire light mass region with A>9, can be used to set stringent constraints on the isovector and isotensor components of the isospin nonconserving forces in theoretical calculations.