Mass measurements of neutron-rich isotopes near $N=20$ by in-trap decay with the ISOLTRAP spectrometer

Abstract : The masses of $^{34}$Si, $^{33,34}$Mg, and $^{34}$Al have been measured with the ISOLTRAP Penning-trap spectrometer at ISOLDE/CERN. The results are in agreement with previous mass measurements and uncertainties have been decreased. The mass of $^{34}$Al was determined in two configurations, one following direct production by the ISOLDE facility, favoring the 4− state, expected to be the ground state, second by in-trap decay of $^{34}$Mg, followed by recoil-ion trapping, favoring the production of the isomeric 1+ state. A position-sensitive detector was used to clean the ToF-ICR resonance. In addition, the mass of the refractory doubly magic $^{34}$Si nucleus was directly measured, using the in-trap decay of $^{34}$Mg, following two sequential recoil-ion captures. The approach, challenges and conclusions are discussed.
Keywords : Nuclear Structure
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Journal articles
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https://hal.archives-ouvertes.fr/hal-02223027
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Submitted on : Thursday, August 1, 2019 - 2:15:44 AM
Last modification on : Wednesday, August 21, 2019 - 11:25:11 PM

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P. Ascher, N. Althubiti, D. Atanasov, K. Blaum, R.B. Cakirli, et al.. Mass measurements of neutron-rich isotopes near $N=20$ by in-trap decay with the ISOLTRAP spectrometer. Phys.Rev.C, 2019, 100 (1), pp.014304. ⟨10.1103/PhysRevC.100.014304⟩. ⟨hal-02223027⟩

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