Year: 2021
Type: article
Abstract: Hyperfine spectra of $^{27--32}\mathrm{Al}$ ($Z=13$) have been measured at the ISOLDE-CERN facility via collinear laser spectroscopy using the $3{s}^{2}3p{\phantom{\rule{4pt}{0ex}}}^{2}{P}_{3/2}^{\text{o}}\ensuremath{\rightarrow}3{s}^{2}4s{\phantom{\rule{4pt}{0ex}}}^{2}{S}_{1/2}$ atomic transition. For the first time, mean-square charge radii of radioactive aluminum isotopes have been determined alongside the previously unknown magnetic dipole moment of $^{29}\mathrm{Al}$ and electric quadrupole moments of $^{29,30}\mathrm{Al}$. A potentially reduced charge radius at $N=19$ may suggest an effect of the $N=20$ shell closure, which is visible in the Al chain, contrary to other isotopic chains in the $sd$ shell. The experimental results are compared with theoretical calculations in the framework of the valence-space in-medium similarity renormalization group using multiple sets of two- and three-nucleon forces from chiral effective field theory. While the trend of experimental magnetic dipole and electric quadrupole moments is well reproduced, the absolute values are underestimated by theory, which is consistent with earlier studies. Moreover, both the scale and trend of the charge radii appear to be very sensitive to the chosen interaction.
Source: Physical Review C
Authors: H. Heylen, C. S. Devlin, W. Gins, M. L. Bissell, K. Blaum, B. Cheal, L. Filippin, R. F. Garcia Ruiz, M. Godefroid, C. Gorges, J. D. Holt, A. Kanellakopoulos, S. Kaufmann, Á. Koszorús, K. König, S. Malbrunot-Ettenauer, T. Miyagi, R. Neugart, G. Neyens, W. Nörtershäuser, R. Sánchez, F. Sommer, L. V. Rodríguez, L. Xie, Z. Y. Xu, X. F. Yang, D. T. Yordanov
Institutions: Max Planck Institute for Nuclear Physics, European Organization for Nuclear Research, KU Leuven, University of Liverpool, University of Jyväskylä, University of Manchester, Université Libre de Bruxelles, Technische Universität Darmstadt, TRIUMF, McGill University, Johannes Gutenberg University Mainz, GSI Helmholtz Centre for Heavy Ion Research, Université Paris-Sud, Centre National de la Recherche Scientifique, Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules, Peking University, State Key Laboratory of Nuclear Physics and Technology
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: TRIUMF, Compute Canada, Western Canada Research Grid, Bundesministerium für Bildung und Forschung, Fonds De La Recherche Scientifique - FNRS, Fonds Wetenschappelijk Onderzoek, Max-Planck-Gesellschaft, University of British Columbia, Vlaamse regering, Helmholtz International Center for FAIR, Natural Sciences and Engineering Research Council of Canada, Science and Technology Facilities Council
OpenAlex ID: W3093427681