O₂(a¹Δ_g) quantum yields, Φ_Δ, for A-RC-A^a.

Gas	Φ Δ
2% O2	0.10
21% O2	0.18
40% O2	0.23
70% O2	0.32
100% O2	0.34

^aErrors on Φ_Δ are ± 10%. Data for the pertinent experiments are shown in Fig. 6.