Abstract
The vacuum ultraviolet fluorescence of Br atoms resulting from photodissociation of HBr was observed using both synchrotron radiation and argon discharge lamp as light sources. The fluorescence spectrum in the 150–165 nm region was dispersed and identified. Both the absorption and fluorescence cross sections were measured in the excitation wavelength region of 105.6–109 nm. The upper limit of HBr dissociation energy is determined to be 3.65±0.03 eV.
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