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| P + hν → P* | S0 → S1 | Excitation | |
| P* → P + hν | S1 → S0 | Fluorescence | (kf) |
| P* → P | S1 → S0 | Radiationless deactivation via internal conversion and/or intersystem crossing | ( ) |
P* →  → P
|
S1 → S0 | Radiationless deactivation via conical intersection | ( ) |
