Speaker
Description
The atomic nucleus exhibits a vast variety of configurations, and despite over a century of study since its discovery, a unified theoretical description of nuclear structure remains incomplete [1]. Progress in this field relies critically on new experimental data from regions of the nuclear chart that remain largely unexplored. One such key region lies in the immediate vicinity of the doubly magic nucleus tin-100, the heaviest bound self-conjugate (N=Z) system, where strong shell effects and proton-neutron correlations are expected to show [2]. The purpose of this research is to investigate the ground-state properties of proton-rich isotopes below tin-100, with particular emphasis on silver isotopes such as silver-95. These nuclei provide a sensitive probe of the robustness of the N=50 shell closure and the evolution of the nuclear structure approaching the N=Z line [3]. Precise measurements of masses, charge radii, and magnetic moments in this region, enabled by newly developed optical spectroscopy and mass spectrometry techniques at the University of Jyväskylä Accelerator Laboratory [4], put to test modern nuclear theories, such as Density Functional Theory (DFT), and could establish a benchmark for future theoretical developments.
I will present the status of magnetic moment measurements performed with in-source resonance ionization spectroscopy on exotic silver isotopes up to silver-95, and give a picture of the the nuclear charge radius below the N=50 shell closure in silver isotopes.
[1] R. Li et al. “Measured proton electromagnetic structure deviates from theoretical predictions”. en. In: Nature (2022).
[2] M. Konieczka et al. “Gamow-Teller response in the configuration space of a density-functional-theory–rooted no-core configuration-interaction model”. In: Physical Review C 97.3 (2018). Publisher: American Physical Society, p. 034310.
[3] J. Karthein et al. “Electromagnetic properties of indium isotopes illuminate the doubly magic character of 100Sn”. In: Nature Physics 20 (2024), p. 1719–1725.
[4] M. Reponen et al. “Evidence of a sudden increase in the nuclear size of proton-rich silver-96”. en. In: Nature Communications 12.1 (2021), p. 4596.