Electronic potential energy curves of the Sr2 Excited Σ and Π states

Figure 1. Potential-energy curves for the ³Σ^± and ⁵Σ^- states. Full lines: ³Σ_g⁺; dashed lines: ³Σ_u⁺; dotted line: ³Σ_u^-; ·-·-·- : ⁵Σ₃^-. Reference

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Figure 2. Potential-energy curves for the ¹Σ⁺ states. Full lines: g-sym.; dashed lines: u-sym. Reference

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Figure 3. Potential-energy curves for the ¹Π states. Full lines: ¹Π_g; dashed lines: ¹Π_u. Reference

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Figure 4. Potential-energy curves for the ^1,3Δ states. Full line: ¹Δ_g; dotted line: ¹Δ_u; dashed line: ³Δ_g; ·-·-·- : ³Δ_u. Reference

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Figure 5. Potential-energy curves for the ³Π states. Full lines: g-sym.; dashed lines: u-sym. Reference

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Figure 6. Comparison between the potential-energy curves of the X ²Σ^u+ state of Sr²⁺ and of some excited states of Sr². Full line: X ²Σ^u+; dashed lines: ³Σ^u+; dotted lines: ^1,3Δ^u; ·-·-·- : (2)¹Σ_u⁺.

Reference

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Figure 7. Potential curves for the excited triplet and singlet states of the Sr² dimer correlating with the ³P + ¹S and ¹P + ¹S asymptotes (1 cm^-1 = 4.556336 × 10^-6 E^h). Reference

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Figure 8. Potential curves for the excited states of the Sr² dimer correlating with the ³D + ¹S and ¹D + ¹S asymptotes. Potential curves arrising from the ³P + ¹S and ¹P + ¹S asymptotes are marked with dashed lines (1 cm^-1 = 4.556336 × 10^-6 E^h). Reference

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Table 1. Spectroscopic parameters D_e (cm^-1) and R_e (a₀) for the excited states Sr₂.

Singlet state	De	Re	Triplet state	De	Re
(4d) 1Δg	5 736	6.25	(5p) 3Σg	362	11.50
(4d) 1Σg	4 550	7.90	(4d) 3Δg	2 790	8.52
(5p) 1Σg	1 107	6.76	(4d) 3Σg	1 353	8.51
(4d) 1Πu	5 410	7.51	(5p) 3Πu	1 892	8.02
(5p) 1Πu	4 068	6.75	(4d) 3Πu	4 805	7.50
(4d) 1Σu	5 440	7.12	(5p) 3Σu	6 895	7.74
(4d) 1Δu	9 263	7.50	(4d) 3Δu	6 037	7.24
(5p) 1Σu	5 490	7.74	(4d) 3Σu	4 698	7.25
(4d) 1Σg	14 590	6.88	(5p) 3Σg	8 936	6.98
(5p) 1Πg	5 483	7.51	(4d) 3Πg	5 016	7.49

Reference