All Figures

$\begin{figure} \par\includegraphics[width=8.3cm,clip]{9057fig1.eps}\end{figure}$ Figure 1: Partial energy level diagram of Sc II, showing the three lowest configurations. The lines measured in the present paper are 3d4s a $\ensuremath{^{3}{\rm {D}}_{}}$ -3d² a $\ensuremath{^{3}{\rm {P}}_{}}$ .
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{9057fig2.eps}\end{figure}$ Figure 2: Energy level diagram showing the pumping channels and major fluorescence decay used in the present experiment, with their approximate wavelengths. The laser is tuned to match the transitions to z³D or z³P, and the subsequent decay to a³D is observed. The level energies are not to scale.
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{9057fig3.eps}\end{figure}$ Figure 3: Decay curve for the a $\ensuremath{^{3}{\rm {P}}_{2}}$ level at base pressure.
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{9057fig4.eps}\end{figure}$ Figure 4: Stern-Vollmer plot for the a $\ensuremath{^{3}{\rm {P}}_{2}}$ level. The apparent lifetime is measured at base pressure and raised pressure, and the true radiative lifetime is derived by extrapolation to zero pressure.
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In the text

$\begin{figure} \par\includegraphics[width=7.4cm,clip]{9057fig5.eps}\end{figure}$ Figure 5: Comparisons of experimental and theoretical lifetimes for the 3d² a³P levels from the present work, and to previous calculations by Warner & Kirkpatrick (1969).
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{9057fig6.eps}\end{figure}$ Figure 6: Spectrum showing the [Sc II] lines used in the present analysis. The upper level of each group is indicated. The transitions are listed in Table 3.
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In the text

$\begin{figure} \par\includegraphics[width=7.65cm,clip]{9057fig7.eps}\end{figure}$ Figure 7: Branching fractions (BF) for 3d4s a³D-3d² a³P. The experimental BFs are derived from the nebular spectrum, using the theoretical values for the residual lines. The 8328 Å line from a³P₀ is not included since this is the only decay observed from this level, and thus makes the experimental BF uninteresting.
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In the text

$\begin{figure} \par\includegraphics[width=7.7cm,clip]{9057fig8.eps}\end{figure}$ Figure 8: Transition rates (A-values) for the 3d4s a³D-3d² a³P transitions. The difference between the theoretical and expermental values, compared to Fig. 4, is due to the difference in lifetimes between experiment and calculations.
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In the text

$\begin{figure} \par\includegraphics[width=8.3cm,clip]{9057fig1.eps}\end{figure}$	Figure 1: Partial energy level diagram of Sc II, showing the three lowest configurations. The lines measured in the present paper are 3d4s a $\ensuremath{^{3}{\rm {D}}_{}}$ -3d² a $\ensuremath{^{3}{\rm {P}}_{}}$ .
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$\begin{figure} \par\includegraphics[width=7cm,clip]{9057fig2.eps}\end{figure}$	Figure 2: Energy level diagram showing the pumping channels and major fluorescence decay used in the present experiment, with their approximate wavelengths. The laser is tuned to match the transitions to z³D or z³P, and the subsequent decay to a³D is observed. The level energies are not to scale.
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$\begin{figure} \par\includegraphics[width=8.2cm,clip]{9057fig3.eps}\end{figure}$	Figure 3: Decay curve for the a $\ensuremath{^{3}{\rm {P}}_{2}}$ level at base pressure.
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$\begin{figure} \par\includegraphics[width=8.2cm,clip]{9057fig4.eps}\end{figure}$	Figure 4: Stern-Vollmer plot for the a $\ensuremath{^{3}{\rm {P}}_{2}}$ level. The apparent lifetime is measured at base pressure and raised pressure, and the true radiative lifetime is derived by extrapolation to zero pressure.
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$\begin{figure} \par\includegraphics[width=7.4cm,clip]{9057fig5.eps}\end{figure}$	Figure 5: Comparisons of experimental and theoretical lifetimes for the 3d² a³P levels from the present work, and to previous calculations by Warner & Kirkpatrick (1969).
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$\begin{figure} \par\includegraphics[width=8.8cm,clip]{9057fig6.eps}\end{figure}$	Figure 6: Spectrum showing the [Sc II] lines used in the present analysis. The upper level of each group is indicated. The transitions are listed in Table 3.
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$\begin{figure} \par\includegraphics[width=7.65cm,clip]{9057fig7.eps}\end{figure}$	Figure 7: Branching fractions (BF) for 3d4s a³D-3d² a³P. The experimental BFs are derived from the nebular spectrum, using the theoretical values for the residual lines. The 8328 Å line from a³P₀ is not included since this is the only decay observed from this level, and thus makes the experimental BF uninteresting.
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$\begin{figure} \par\includegraphics[width=7.7cm,clip]{9057fig8.eps}\end{figure}$	Figure 8: Transition rates (A-values) for the 3d4s a³D-3d² a³P transitions. The difference between the theoretical and expermental values, compared to Fig. 4, is due to the difference in lifetimes between experiment and calculations.
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