cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.1012747
title: The basis exponents and coefficients for N<sub>2</sub>

description: <b>Table 1.</b> The basis exponents and coefficients for N<sub>2</sub>. <strong>Abstract</strong> We have determined the multiply differential cross sections (MDCS) of the vertical photo-double ionization of diatomic nitrogen with coincidence detection of the ejected electrons, for fixed and random orientations of the internuclear axis, using the correlated product of two two-centre continuum Coulomb functions for the description of the two ejected electrons, which satisfies the exact asymptotic conditions. To verify our procedure, we have applied it to the photo-double ionization of diatomic hydrogen for which many experimental and theoretical results are available. Our results on diatomic hydrogen show the influence of the initial state correlation. In the case of diatomic nitrogen only, the photo-double ionization of the 3σ<sub><em>g</em></sub> orbital is considered resulting in the <sup>1</sup>Σ<sub><em>g</em></sub> state of the residual N_2^{2+} dication. The case of the nearby <sup>3</sup>Π<sub><em>u</em></sub> final state having an open shell configuration will be considered in a future paper. Our results confirm the symmetry properties of the MDCS and give the optimal ejection angles. A comparison is also made with results obtained by the Gaussian parametrization method.
DOI: 10.6084/m9.figshare.1012748.v1
title: The molecular orbital energies and total energy of N<sub>2</sub>

description: <b>Table 2.</b> The molecular orbital energies and total energy of N<sub>2</sub>. <strong>Abstract</strong> We have determined the multiply differential cross sections (MDCS) of the vertical photo-double ionization of diatomic nitrogen with coincidence detection of the ejected electrons, for fixed and random orientations of the internuclear axis, using the correlated product of two two-centre continuum Coulomb functions for the description of the two ejected electrons, which satisfies the exact asymptotic conditions. To verify our procedure, we have applied it to the photo-double ionization of diatomic hydrogen for which many experimental and theoretical results are available. Our results on diatomic hydrogen show the influence of the initial state correlation. In the case of diatomic nitrogen only, the photo-double ionization of the 3σ<sub><em>g</em></sub> orbital is considered resulting in the <sup>1</sup>Σ<sub><em>g</em></sub> state of the residual N_2^{2+} dication. The case of the nearby <sup>3</sup>Π<sub><em>u</em></sub> final state having an open shell configuration will be considered in a future paper. Our results confirm the symmetry properties of the MDCS and give the optimal ejection angles. A comparison is also made with results obtained by the Gaussian parametrization method.
DOI: 10.6084/m9.figshare.1012747.v1
title: The basis exponents and coefficients for N<sub>2</sub>

description: <b>Table 1.</b> The basis exponents and coefficients for N<sub>2</sub>. <strong>Abstract</strong> We have determined the multiply differential cross sections (MDCS) of the vertical photo-double ionization of diatomic nitrogen with coincidence detection of the ejected electrons, for fixed and random orientations of the internuclear axis, using the correlated product of two two-centre continuum Coulomb functions for the description of the two ejected electrons, which satisfies the exact asymptotic conditions. To verify our procedure, we have applied it to the photo-double ionization of diatomic hydrogen for which many experimental and theoretical results are available. Our results on diatomic hydrogen show the influence of the initial state correlation. In the case of diatomic nitrogen only, the photo-double ionization of the 3σ<sub><em>g</em></sub> orbital is considered resulting in the <sup>1</sup>Σ<sub><em>g</em></sub> state of the residual N_2^{2+} dication. The case of the nearby <sup>3</sup>Π<sub><em>u</em></sub> final state having an open shell configuration will be considered in a future paper. Our results confirm the symmetry properties of the MDCS and give the optimal ejection angles. A comparison is also made with results obtained by the Gaussian parametrization method.
DOI: 10.6084/m9.figshare.1012720
title: Breakdown of the contributions to the dipole polarizabilities of the Ga<sup>+</sup> clock transition states

description: <b>Table 6.</b> Breakdown of the contributions to the dipole polarizabilities of the Ga<sup>+</sup> clock transition states. The δα<sub>1</sub> column gives the contribution from the indicated transition class. The ∑α<sub>1</sub> column gives the accumulated sum. The final polarizabilities are given in bold-face and the uncertainties in the last digits are given in brackets. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012721
title: Parameters of the { m ns}^2 ^1{ m S}^{ m e}_0 ightarrow { m nsnp} ^3{ m P}^{ m o}_0 clock transitions for the group III ions

description: <b>Table 7.</b> Parameters of the {\rm ns}^2 \ ^1{\rm S}^{\rm e}_0 \rightarrow {\rm nsnp} \ ^3{\rm P}^{\rm o}_0 clock transitions for the group III ions. The BBR shifts are evaluated at 300 K. The ν<sub>nat</sub> column gives available data for the natural line-width of the clock transitions. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012718
title: The pseudo-oscillator strength distribution for the Ga<sup>3 +</sup> ion core

description: <b>Table 4.</b> The pseudo-oscillator strength distribution for the Ga<sup>3 +</sup> ion core. The dipole polarizability of the core was 1.24 au [21] while the quadrupole polarizability was 2.345 au [21]. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012719
title: The polarizabilities of some low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions

description: <b>Table 5.</b> The polarizabilities of some low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions. The scalar adiabatic polarizabilities, α<sub><em>k</em></sub>, are listed along with some non-adiabatic, β<sub><em>k</em></sub>, and tensor, \alpha ^{(1)}_{2, L_0 L_0}, polarizabilities. The polarizabilities are in atomic units and the notation <em>a</em>[<em>b</em>] means <em>a</em> <b>×</b> 10<sup><em>b</em></sup>. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012720.v1
title: Breakdown of the contributions to the dipole polarizabilities of the Ga<sup>+</sup> clock transition states

description: <b>Table 6.</b> Breakdown of the contributions to the dipole polarizabilities of the Ga<sup>+</sup> clock transition states. The δα<sub>1</sub> column gives the contribution from the indicated transition class. The ∑α<sub>1</sub> column gives the accumulated sum. The final polarizabilities are given in bold-face and the uncertainties in the last digits are given in brackets. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012721.v1
title: Parameters of the { m ns}^2 ^1{ m S}^{ m e}_0 ightarrow { m nsnp} ^3{ m P}^{ m o}_0 clock transitions for the group III ions

description: <b>Table 7.</b> Parameters of the {\rm ns}^2 \ ^1{\rm S}^{\rm e}_0 \rightarrow {\rm nsnp} \ ^3{\rm P}^{\rm o}_0 clock transitions for the group III ions. The BBR shifts are evaluated at 300 K. The ν<sub>nat</sub> column gives available data for the natural line-width of the clock transitions. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012716
title: Absorption oscillator strengths for some low-lying transitions of Ga<sup>2 +</sup>

description: <b>Table 2.</b> Absorption oscillator strengths for some low-lying transitions of Ga<sup>2 +</sup>. The acronyms MP and RCC are defined in the text while RMBPT refers to relativistic many body perturbation theory and MCHF refers to (non-relativistic) multi-configuration Hartree–Fock. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012717
title: Absorption oscillator strengths for some low-lying transitions of Ga<sup>+</sup>

description: <b>Table 3.</b> Absorption oscillator strengths for some low-lying transitions of Ga<sup>+</sup>. The RRPA column lists calculations performed in the relativistic random phase approximation. The CICP oscillator strengths were obtained from calculations where the core-polarization potentials were tuned to give the energies of the identified spin–orbit state. The notation <em>a</em>[<em>b</em>] means <em>a</em> <b>×</b> 10<sup><em>b</em></sup>. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012718.v1
title: The pseudo-oscillator strength distribution for the Ga<sup>3 +</sup> ion core

description: <b>Table 4.</b> The pseudo-oscillator strength distribution for the Ga<sup>3 +</sup> ion core. The dipole polarizability of the core was 1.24 au [21] while the quadrupole polarizability was 2.345 au [21]. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012719.v1
title: The polarizabilities of some low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions

description: <b>Table 5.</b> The polarizabilities of some low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions. The scalar adiabatic polarizabilities, α<sub><em>k</em></sub>, are listed along with some non-adiabatic, β<sub><em>k</em></sub>, and tensor, \alpha ^{(1)}_{2, L_0 L_0}, polarizabilities. The polarizabilities are in atomic units and the notation <em>a</em>[<em>b</em>] means <em>a</em> <b>×</b> 10<sup><em>b</em></sup>. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012715
title: Theoretical and experimental energy levels (in Hartree) for some of the low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions

description: <b>Table 1.</b> Theoretical and experimental energy levels (in Hartree) for some of the low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions. The energies are given relative to the energy of the Ga<sup>3 +</sup> core. The experimental energies for the spin–orbit doublets of Ga<sup>+</sup> are averages with the usual (2<em>J</em> + 1) weighting factors. The CICP energies for Ga<sup>+</sup> are those computed after additional tuning of the ρ<sub>ℓ</sub> parameters. The experimental data were taken from the National Institute of Standards and Technology [27]. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012716.v1
title: Absorption oscillator strengths for some low-lying transitions of Ga<sup>2 +</sup>

description: <b>Table 2.</b> Absorption oscillator strengths for some low-lying transitions of Ga<sup>2 +</sup>. The acronyms MP and RCC are defined in the text while RMBPT refers to relativistic many body perturbation theory and MCHF refers to (non-relativistic) multi-configuration Hartree–Fock. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012717.v1
title: Absorption oscillator strengths for some low-lying transitions of Ga<sup>+</sup>

description: <b>Table 3.</b> Absorption oscillator strengths for some low-lying transitions of Ga<sup>+</sup>. The RRPA column lists calculations performed in the relativistic random phase approximation. The CICP oscillator strengths were obtained from calculations where the core-polarization potentials were tuned to give the energies of the identified spin–orbit state. The notation <em>a</em>[<em>b</em>] means <em>a</em> <b>×</b> 10<sup><em>b</em></sup>. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.
DOI: 10.6084/m9.figshare.1012715.v1
title: Theoretical and experimental energy levels (in Hartree) for some of the low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions

description: <b>Table 1.</b> Theoretical and experimental energy levels (in Hartree) for some of the low-lying states of the Ga<sup>2 +</sup> and Ga<sup>+</sup> ions. The energies are given relative to the energy of the Ga<sup>3 +</sup> core. The experimental energies for the spin–orbit doublets of Ga<sup>+</sup> are averages with the usual (2<em>J</em> + 1) weighting factors. The CICP energies for Ga<sup>+</sup> are those computed after additional tuning of the ρ<sub>ℓ</sub> parameters. The experimental data were taken from the National Institute of Standards and Technology [27]. <strong>Abstract</strong> The blackbody radiation shift of the Ga<sup>+</sup>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<sup>+</sup>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 Ga<sup>2 +</sup> ion.