Relativistic many-body calculation of energies, oscillator strengths, transition rates, lifetimes, polarizabilities, and quadrupole moment of Fr-like Th IV ion

TL;DR

This paper presents high-precision relativistic calculations of various atomic properties of Th IV ion, including energies, transition rates, and polarizabilities, aiding experimental and theoretical research in nuclear clocks and actinide studies.

Contribution

It introduces a comprehensive relativistic all-order calculation method for Th IV ion's atomic properties, providing highly accurate data with estimated uncertainties.

Findings

Calculated energies, oscillator strengths, and transition rates for Th IV.

Provided recommended values for polarizabilities and quadrupole moments.

Data supports development of nuclear clocks and actinide research.

Abstract

Atomic properties of the 24 low-lying ns, np, nd, nf, and ng states in Th IV ion are calculated using the high-precision relativistic all-order method where all single, double, and partial triple excitations of the Dirac-Fock wave functions are included to all orders of perturbation theory. Recommended values are provided for a large number of electric-dipole matrix elements, oscillator strengths, transition rates, and lifetimes. Scalar polarizabilities of the ground and six excited states (5f_j, 6d_j, 7p_j, and 7s), and tensor polarizabilities of the 5f_j, 6d_j, 7p_{3/2} states of Th IV are evaluated. The uncertainties of the recommended values are estimated. These calculations provide recommended values critically evaluated for their accuracy for a number of Th IV atomic properties for use in theoretical modeling as well as planning and analysis of various experiments including development of ultra precise nuclear clock and RESIS studies of actinide ions