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Table 4 The effect of varying ultraviolet intensity on the quantum yield (Φ) of 1,3-butadiene

From: Reactivity and kinetics of 1,3-butadiene under ultraviolet irradiation at 254 nm

I/(μW cm−2) k2/h−1 I0/(μW cm−2) I1/(μW cm−2) I0I1/(μW cm−2) Φ
25 0.001670 20 18.7 1.3 37.19
50 0.002417 38 35.2 2.8 24.99
100 0.003418 72 69 3 32.99
200 0.005297 133 127 6 25.56
300 0.007364 207 198 9 23.69
400 0.009555 280 272 8 34.58
500 0.01282 351 342 9 41.24