open access

https://hdl.handle.net/2115/49425

Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

英語

time of flight spectra

2010-09-14

American Institute of Physics

Journal of Chemical Physics

133(10)

104504

Photodesorption of O2 (X3 Σ^[-]_[g]) and O2 (a 1Δg) from amorphous solid water at 90 K has been studied following photoexcitation within the first absorption band at 157 nm. Time-of-flight and rotational spectra of O2 reveal the translational and internal energy distributions, from which production mechanisms are deduced. Exothermic and endothermic reactions of OH+O(3P) are proposed as plausible formation mechanisms for O2(X 3Σ^[-]_[g] and a 1Δg). To examine the contribution of the O(3P) + O(3P) recombination reaction to the O2 formation following 157 nm photolysis of amorphous solid water, O2 products following 193 nm photodissociation of SO2 adsorbed on amorphous solid water were also investigated.

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Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Chem. Phys. 133, 104504 (2010) and may be found at https://dx.doi.org/10.1063/1.3474999

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