Mass measurements of neutron-rich strontium and rubidium isotopes in the A ≈ 100 and development of an electrospray ionization ion source

Abstract : An extension of the atomic mass surface in the region A ≈ 100 is performed via massmeasurements of the 100-102Sr and 100-102Rb isotopes with the ion-trap mass spectrometer ISOLTRAPat CERN-ISOLDE. The first direct mass measurements of 102Sr and 101;102Rb are reported here. Thesemeasurements confirm the continuation of the region of nuclear deformation with the increase of neutronnumber, at least as far as N = 65.In order to interpret the deformation in the strontium isotopic chain and to determine whether an onsetof deformation is present in heavier krypton isotopes, a comparison is made between experimentalvalues and theoretical calculations available in the literature. To complete this comparison, Hartree-Fock-Bogoliubov calculations for even and odd isotopes are also presented, illustrating the competitionof nuclear shapes in the region.The development of an electrospray ionization ion source is presented. This source can delivera large range of isobaric masses for calibration purposes. The early commissioning of the sourceis discussed, including the results from the first mass scans detected behind the quadrupole massspectrometer. A resolution of a few atomic mass units is reached.
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Antoine de Roubin. Mass measurements of neutron-rich strontium and rubidium isotopes in the A ≈ 100 and development of an electrospray ionization ion source. Other. Université de Bordeaux, 2016. English. ⟨NNT : 2016BORD0426⟩. ⟨tel-01502435⟩

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