<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>B</mi><mi>ρ</mi></mrow></math>-defined isochronous mass spectrometry: An approach for high-precision mass measurements of short-lived nuclei

M. Wang; M. Zhang; X. Zhou; Y. H. Zhang; Yu. A. Litvinov; H. S. Xu; R. J. Chen; H. Y. Deng; C. Y. Fu; W. W. Ge; H. F. Li; T. Liao; S. A. Litvinov; P. Shuai; J. Y. Shi; M. Si; R. S. Sidhu; Y. N. Song; M. Z. Sun; S. Suzuki; Q. Wang; Y. M. Xing; X. Xu; T. Yamaguchi; X. L. Yan; J. C. Yang; Y. J. Yuan; Q. Zeng; X. H. Zhou

doi:10.1103/PhysRevC.106.L051301

Letter

$B ρ$ -defined isochronous mass spectrometry: An approach for high-precision mass measurements of short-lived nuclei

M. Wang ^1,2,*, M. Zhang^1,2, X. Zhou^1,2, Y. H. Zhang ^1,2,†, Yu. A. Litvinov^1,3,‡, H. S. Xu^1,2, R. J. Chen^1,3, H. Y. Deng^1,2, C. Y. Fu¹ et al.

W. W. Ge¹, H. F. Li^1,2, T. Liao^1,2, S. A. Litvinov^1,3, P. Shuai¹, J. Y. Shi^1,2, M. Si^1,2, R. S. Sidhu³, Y. N. Song^1,2, M. Z. Sun¹, S. Suzuki¹, Q. Wang^1,2, Y. M. Xing¹, X. Xu¹, T. Yamaguchi⁴, X. L. Yan¹, J. C. Yang^1,2, Y. J. Yuan^1,2, Q. Zeng⁵, and X. H. Zhou^1,2

¹CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
²School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
³GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
⁴Department of Physics, Saitama University, Saitama 338-8570, Japan
⁵School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China

^*wangm@impcas.ac.cn
^†yhzhang@impcas.ac.cn
^‡y.litvinov@gsi.de

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Phys. Rev. C 106, L051301 – Published 1 November, 2022

DOI: https://doi.org/10.1103/PhysRevC.106.L051301

Abstract

A technique for broadband high-precision mass measurements of short-lived exotic nuclides is reported. It is based on the isochronous mass spectrometry (IMS) and realizes simultaneous determinations of revolution time and velocity of short-lived stored ions at the cooler storage ring CSRe in Lanzhou. The technique, named the $B ρ$ -defined IMS or $B ρ$ -IMS, boosts the efficiency, sensitivity, and accuracy of mass measurements, and is applied here to measure masses of neutron-deficient $f p$ -shell nuclides. In a single accelerator setting, masses of ${}^{46}{Cr}$ , ${}^{50}{Fe}$ , and ${}^{54}{Ni}$ are determined with relative uncertainties of (5–6) $\times 10^{- 8}$ , thereby improving the input data for testing the unitarity of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. This is the technique of choice for future high-precision measurements of the most rarely produced shortest-lived nuclides.

Physical Review C

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$B ρ$ -defined isochronous mass spectrometry: An approach for high-precision mass measurements of short-lived nuclei

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Bρ-defined isochronous mass spectrometry: An approach for high-precision mass measurements of short-lived nuclei

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$B ρ$ -defined isochronous mass spectrometry: An approach for high-precision mass measurements of short-lived nuclei