Mass Measurements of Exotic 48-50Ar Isotopes: Probing Proton-Neutron Interaction of the Doubly Magic 52Ca and the Robustness of N=32 Subshell

Fu, C. Y.; Xian, W. D.; Niwase, T.; Rosenbusch, M.; Wada, M.; Scalesi, A.; Soma, V.; Lee, J.; Ishiyama, H.; Nishimura, S.; Yoshida, S.; Takamine, A.; Schury, P.; Hou, D. S.; Kimura, S.; Hirayama, Y.; Ito, Y.; Iimura, S.; Yap, J. M.; Watanabe, Y. X.; Zeng, Q. B.; Phong, V. H.; Yeung, T. T.; Ueno, H.; Haba, H.; Duguet, T.; Frosini, M.; Li, Z. H.; Wu, H. Y.; Estrade, A.; Khandelwal, M.; Jang, Y.; Morales, A. I.; Kanungo, R.; Tanaka, M.; Suzuki, D.; Ong, H. J.; Sakurai, H.; Michimasa, S.; Fukuda, N.; Takeda, H.; Suzuki, H.; Shimizu, Y.; Ohtake, M.; Kusaka, K.; Yanagisawa, Y.; Togano, Y.; Yoshimoto, M.; Hong, B.; Kim, Y. H.; Ma, X.; Moon, B.; Park, J.; Zeng, F. F.; Zhang, J. Z.

doi:10.1103/krq1-t8pr

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Mass Measurements of Exotic 48-50Ar Isotopes: Probing Proton-Neutron Interaction of the Doubly Magic 52Ca and the Robustness of N=32 Subshell

Fu, C. Y.;
Xian, W. D.;
Niwase, T.;
Rosenbusch, M.;
Wada, M.;
... Hong, B.;
외 49명

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High-precision multireflection time-of-flight mass spectrometry has been applied at BigRIPS-SLOWRI of the Radioactive Isotope Beam Factory (RIBF). The atomic mass of 50Ar was measured for the first time, and the mass value of 49Ar was determined to be 674 keV lower than the one from a previous B rho- TOF measurement, with a precision improved by a factor of 250. The new mass data enable us to determine the empirical proton-neutron interaction strength in the unconventional doubly magic nucleus 52Ca. This strength exhibits a conspicuous variation across shell closures, analogously to what observed in classical doubly magic nuclei. Meanwhile, our measurements support the existence of a weak shell effect at N 1/4 32 in Ar isotopes. To supplement these experimental findings, theoretical calculations were performed for the isotopes of interest, which, compared with data, illustrate the capacity of ab initio expansion methods to capture key quadrupole correlations in doubly open-shell nuclei via an explicit account of nuclear deformation.

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제목: Mass Measurements of Exotic 48-50Ar Isotopes: Probing Proton-Neutron Interaction of the Doubly Magic 52Ca and the Robustness of N=32 Subshell

저자: Fu, C. Y.; Xian, W. D.; Niwase, T.; Rosenbusch, M.; Wada, M.; Scalesi, A.; Soma, V.; Lee, J.; Ishiyama, H.; Nishimura, S.; Yoshida, S.; Takamine, A.; Schury, P.; Hou, D. S.; Kimura, S.; Hirayama, Y.; Ito, Y.; Iimura, S.; Yap, J. M.; Watanabe, Y. X.; Zeng, Q. B.; Phong, V. H.; Yeung, T. T.; Ueno, H.; Haba, H.; Duguet, T.; Frosini, M.; Li, Z. H.; Wu, H. Y.; Estrade, A.; Khandelwal, M.; Jang, Y.; Morales, A. I.; Kanungo, R.; Tanaka, M.; Suzuki, D.; Ong, H. J.; Sakurai, H.; Michimasa, S.; Fukuda, N.; Takeda, H.; Suzuki, H.; Shimizu, Y.; Ohtake, M.; Kusaka, K.; Yanagisawa, Y.; Togano, Y.; Yoshimoto, M.; Hong, B.; Kim, Y. H.; Ma, X.; Moon, B.; Park, J.; Zeng, F. F.; Zhang, J. Z.

DOI: 10.1103/krq1-t8pr

발행일: 2026-08-06

유형: Article

저널명: Physical Review Letters

권: 137

호: 6

언어: ENG

출판사: AMER PHYSICAL SOC

발행국가: 미국

ISSN: E 1079-7114
P 0031-9007