High-resolution laser spectroscopy of ${}^{27-32}$Al

Abstract

Hyperfine spectra of ${}^{\text{27-32}}$Al ($Z=13$) have been measured at the ISOLDE-CERN facility via collinear laser spectroscopy using the $3s^{2}3p{}^2{\text{P}}_{3/2}^{\text{o}}\to 3s^{2}4s{}^2{\text{S}}_{1/2}$ 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 ${}^{29}$Al and electric quadrupole moments of ${}^{29,30}$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 to 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, consistent with earlier studies. Moreover, both the scale and trend of the charge radii appear to be very sensitive to the chosen interaction.

References in corpus (32)

• Modern Theory of Nuclear Forces
• Chiral effective field theory and nuclear forces
• Improved nuclear matter calculations from chiral low-momentum interactions
• Accurate nuclear radii and binding energies from a chiral interaction
• The In-Medium Similarity Renormalization Group: A Novel Ab Initio Method for Nuclei
• Thick-Restart Block Lanczos Method for Large-Scale Shell-Model Calculations
• Unexpectedly large charge radii of neutron-rich calcium isotopes
• Charge, neutron, and weak size of the atomic nucleus
• Discrepancy between experimental and theoretical $\beta$-decay rates resolved from first principles
• A nucleus-dependent valence-space approach to nuclear structure
• Non-Empirical Interactions for the Nuclear Shell Model: An Update
• Structure of the lightest tin isotopes
• Ab initio limits of atomic nuclei
• Nonperturbative shell-model interactions from the in-medium similarity renormalization group
• Saturation with chiral interactions and consequences for finite nuclei
• ${}^{78}$Ni revealed as a doubly magic stronghold against nuclear deformation
• In-Medium Similarity Renormalization Group for Open-Shell Nuclei
• The Magnus expansion and the in-medium similarity renormalization group
• Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes
• Radii and binding energies in oxygen isotopes: a puzzle for nuclear forces
• Quantum Monte Carlo calculations of electromagnetic moments and transitions in A <= 9 nuclei with meson-exchange currents derived from chiral effective field theory
• Exploring sd-shell nuclei from two- and three-nucleon interactions with realistic saturation properties
• Ab initio multi-shell valence-space Hamiltonians and the island of inversion
• Ab initio electromagnetic observables with the in-medium similarity renormalization group
• Nuclear charge radii of potassium isotopes beyond N=28
• Testing microscopically derived descriptions of nuclear collectivity: Coulomb excitation of 22Mg
• Ground-State Electromagnetic Moments of Calcium Isotopes
• First glimpse of the $N=82$ shell closure below $Z=50$ from masses of neutron-rich cadmium isotopes and isomers
• Charge radius of the short-lived ${}^{68}$Ni and correlation with the dipole polarizability
• Ground State Electromagnetic Moments of ${}^{37}$Ca
• Multiconfiguration calculations of electronic isotope shift factors in Al I
• High-precision quadrupole moment reveals significant intruder component in 33Al20 ground state

Cited by in corpus (18)

• Laser Spectroscopy for the Study of Exotic Nuclei
• Nuclear Charge Radii of the Nickel Isotopes ${}^{58-68,70}$Ni
• Proton distribution radii of ${}^{16-24}$O: signatures of new shell closures and neutron skin
• Impact of two-body currents on magnetic dipole moments of nuclei
• Isotope Shifts in Cadmium as a Sensitive Probe for Physics Beyond the Standard Model
• Nuclear charge radii of Na isotopes: A tale of two theories
• First Determination of the 27Al Neutron Distribution Radius from a Parity-Violating Electron Scattering Measurement
• Kinetic-beam-energy determination via collinear laser spectroscopy
• Nuclear charge radius of ${}^{26m}$Al and its implication for V${}_{ud}$ in the quark-mixing matrix
• Electromagnetic moments of the antimony isotopes ${}^{112-133}$Sb
• Critical evaluation of reference charge radii and applications in mirror nuclei
• Ground State Magnetic Dipole Moment of ${}^{40}$Sc
• Triaxial relativistic Hartree-Bogoliubov theory in continuum for exotic nuclei
• Cabibbo-Kobayashi-Maskawa unitarity deficit reduction via finite nuclear size
• Isotope-shift factors with quantum electrodynamics effects for many-electron systems: A study of the nuclear charge radius of ${}^{26m}$Al
• Implication of shell quenching in scandium isotopes around N=20
• Exploring nuclear structure with multiparticle azimuthal correlations at the LHC
• Modelling of transient interference phenomena in collinear laser spectroscopy