Ultraviolet photodissociation of 1-bromopropane at 234 and 267Â nm

The photodissociation of 1-bromopropane was investigated at 234 and 267 nm utilizing ion velocity imaging method. Both the speed and angular distributions of Br*(2P1/2) and Br(2P3/2) fragments were determined. β(Br) = 0.77 ± 0.07 and β(Br*)= 1.68 ± 0.06 at 234 nm; β(Br) = 0.38 ± 0.02 and β(Br*) = 1.33 ± 0.09 at 267 nm were observed. The total translational energy distributions were single Gaussian distribution and interpreted using soft or rigid implusive mode at different wavelength, respectively. The experiment also shows that Br is dominant in the dissociation and originates mostly from 3A′, while Br* corresponds to 4A′ ← 3A′ coupling.