%0 Generic %A Cheng, Yongjun %A Mitroy, J %D 2013 %T Theoretical and experimental energy levels (in Hartree) for some of the low-lying states of the Ga2 + and Ga+ ions %U https://iop.figshare.com/articles/dataset/_Theoretical_and_experimental_energy_levels_in_Hartree_for_some_of_the_low_lying_states_of_the_Ga_su/1012715 %R 10.6084/m9.figshare.1012715.v1 %2 https://iop.figshare.com/ndownloader/files/1480538 %K group III ions %K Ga 2 %K rm %K polarizabilitie %K blackbody radiation shifts %K cicp %K configuration interaction method %K blackbody radiation shift %K Atomic Physics %K Molecular Physics %X

Table 1. Theoretical and experimental energy levels (in Hartree) for some of the low-lying states of the Ga2 + and Ga+ ions. The energies are given relative to the energy of the Ga3 + core. The experimental energies for the spin–orbit doublets of Ga+ are averages with the usual (2J + 1) weighting factors. The CICP energies for Ga+ are those computed after additional tuning of the ρ parameters. The experimental data were taken from the National Institute of Standards and Technology [27].

Abstract

The blackbody radiation shift of the Ga+4{\rm s}^2 \ ^1{\rm S}^{\rm e}_0 \rightarrow 4{\rm s}4{\rm p} \ ^3{\rm P}^{\rm o}_0 clock transition is computed to be −0.0140 ± 0.0062 Hz at 300 K. The small shift is consistent with the blackbody radiation shifts of the clock transitions of other group III ions which are of a similar size. The polarizabilities of the Ga+4{\rm s}^2 \ ^1{\rm S}^{\rm e}_0, 4{\rm s}4{\rm p} \ ^3{\rm P}^{\rm o}_0, and 4{\rm s}4{\rm p} \ ^1{\rm P}^{\rm o}_1 states were computed using the configuration interaction method with an underlying semi-empirical core potential. Quadrupole and non-adiabatic dipole polarizabilities were also computed. A byproduct of the analysis involved calculations of the low-lying spectrum and oscillator strengths, including polarizabilities, of the Ga2 + ion.

%I IOP Publishing