Speaker
Description
Studies of exotic nuclei have revealed numerous unexpected structure phenomena, extending our knowledge of nuclear forces and nuclear quantum many-body systems [1,2,3]. The scandium isotopes, with one valence proton added in the f7/2 orbit above the Z = 20 shell closure in the shell-model picture, are expected to be sensitive to the single-particle behavior, and nucleon-nucleon correlations. Nuclear electromagnetic properties of 44-49Sc were measured at ISOLDE-CERN using high-resolution collinear laser spectroscopy (COLLAPS). Together with earlier studies in the literature, this work completes the systematic trends of the electromagnetic moments of Z = 21 isotopes and N = 28 isotones when valence neutrons and protons filling the distinctive f7/2 orbit, respectively [4]. In addition, the nuclear charge radii of scandium isotopes up to N = 28 shell closure have been extracted.
In this talk, the details of the COLLAPS experiment, as well as the extracted experimental results (nuclear electromagnetic moments and charge radii) of scandium isotopes will be presented. These results will then be discussed by a comparison with region systematics and with theoretical calculations by large-scale shell-model and ab-initio VS-IMSRG.
[1] D. Steppenbeck et al., Nature 502, 207 (2013); F. Wienholtz et al., Nature 498, 346 (2013); Felix Sommer et al., Phys. Rev. Lett 129, 132501 (2022)
[2] Jason D Holt et al., J. Phys. G: Nucl. Part. Phys 39, 085111 (2012); G. Hagen et al., Phys. Rev. Lett 109, 032502 (2012)
[3] R. F Garcia Ruiz et al., Phys. Rev. C 91, 0421304 (2015); R. F Garcia Ruiz et al., Nat. Phys 12, 594 (2016); J. Papuga et al., Phys. Rev. Lett 110, 172503 (2013); J. Papuga et al., Phys. Rev. C 90, 034321 (2014)
[4] S. W. Bai et al., Phys. Lett. B 829, 137064 (2022)
