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High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

Abstract : The atomic masses of the neutron-deficient radioactive rubidium isotopes $^{74-77,79,80,83}$Rb have been measured with the Penning trap mass spectrometer ISOLTRAP. Using the time-of-flight cyclotron resonance technique, relative mass uncertainties ranging from 1.6×10$^{-8}$ to 5.6×10$^{-8}$ were achieved. In all cases, the mass precision was significantly improved as compared with the prior Atomic-Mass Evaluation; no significant deviations from the literature values were observed. The exotic nuclide $^{74}$Rb, with a half-life of only 65 ms, is the shortest-lived nuclide on which a high-precision mass measurement in a Penning trap has been carried out. The significance of these measurements for a check of the conserved-vector-current hypothesis of the weak interaction and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix is discussed.
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http://hal.in2p3.fr/in2p3-00184527
Contributor : Dominique Girod <>
Submitted on : Wednesday, October 31, 2007 - 11:45:25 AM
Last modification on : Wednesday, September 16, 2020 - 4:17:40 PM

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A. Kellerbauer, G. Audi, D. Beck, K. Blaum, G. Bollen, et al.. High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer. Physical Review C, American Physical Society, 2007, 76, pp.045504. ⟨10.1103/PhysRevC.76.045504⟩. ⟨in2p3-00184527⟩

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