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A: Fachverband Atomphysik
A 27: Precision Spectroscopy of Atoms and Ions III (joint session A/Q)
A 27.5: Vortrag
Donnerstag, 14. März 2024, 12:00–12:15, HS 1010
Advancing RAdiation Detected Resonance Ionization towards more exotic nuclei — •Kenneth van Beek for the Radris Collaboration — TU Darmstadt
Experimental data on atomic and nuclear properties for exotic nuclei in the heavy actinide region (Z≥100) remains scarce up to date. The RAdiation Detected Resonance Ionization Spectroscopy (RADRIS) apparatus, located at GSI, Darmstadt, Germany, is employed to determine such quantities — such as energy levels, ionization potentials, moments, mean-square charge radii, and isotope shifts. Past measurements at RADRIS encompassed the study of 245,246,248−250,254Fm and 251−255No. In the current design of the setup the detection of laser ions via their α-decay for nuclei with half-lives in the order of several hours to tens of hours becomes impractical. This presentation will show already obtained results by RADRIS and how future improvements will increase the methods reach towards longer-lived nuclei. This will allow accessing, e.g., 246Cf (35.7 h) and 252Fm (25.39 h). The latter is of special interest, as it lies directly at the N=152 shell gap in the fermium isotopic sequence, thus closing the gap between already studied isotopes on the neutron-rich and on the neutron-poor side.
Keywords: Resonance Ionization Spectrposcopy; Heavy Actinides