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High resolution in-gas-jet laser ionization spectroscopy of very heavy elements with S3 LEB

Alexandra Zadvornaya (Institute for Nuclear and Radiation Physics (IKS), KU Leuven, Belgium)

11h00 GANIL seminar room (105)

a coffee will be served 15mn before



The study of ground- and excited-state properties of short-lived very heavy nuclei calls for a high-sensitive and high resolution experimental technique. In order to meet these requirements the method of resonance ionization spectroscopy in supersonic gas jets is under development and optimization as a part of well-established In-Gas Laser Ionization and Spectroscopy (IGLIS) technique. Supersonic gas jets are characterized as a low-density and low-temperature media, in which the spectral linewidth broadening is significantly reduced in comparison to that in the stagnation conditions of a gas cell. Recent experiments performed on the resonance ionization of the 214,215Ac isotopes in supersonic gas jet expansion, proved a significant reduction of the spectral linewidth, enabling in this way the extraction of the nuclear electric quadrupole moments and nuclear spins, alongside with magnetic dipole moments and isotope shifts.

In order to further investigate the limits of the attainable spectral resolution and efficiency of the in-gas-jet method, a detailed characterization of the supersonic gas jet formation is ongoing at the IGLIS laboratory in KU Leuven utilizing non-intrusive atomic PLIF-spectroscopy and will be presented within this seminar.

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