Dissociative ionization of hot C₃H₅ radicals

Abstract

The combination of ultraviolet (uv) photodissociation, vacuum-ultraviolet (vuv) photoionization, and velocity-map ion imaging is used to explore the dissociative ionization of allyl and 2-propenyl C₃H₅ radicals that have significant amounts of internal energy. The effect of the internal energy of the radicals on the fragmentation dynamics of the parent photoion is first discussed for the general case, and then for the specific C₃H₅ radicals. The results are relevant to an increasing number of studies in which single-photon vuv photoionization is used as a ‘soft’ ionization method for radicals produced in photodissociation and reactive scattering experiments, as well as in reactive environments such as flames and plasmas.

^†The submitted manuscript has been created by UChicago Argonne LLC, Operator of Argonne National Laboratory, (‘Argonne’). Argonne a US Department of Energy Office of Science Laboratory, is operated, under Contract No. DE-AC02-06CH11357 with the U.S. Department of Energy. The U.S. Government retains for itself, and others acting on its behalf, a paid-up, nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicaly and display publicly, by or on behalf of the Government.

Keywords:

• Photoionization
• Photodissociation
• Dissociative photoionization
• Radicals

Acknowledgements

This work was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biological Sciences under contract No. DE-AC02-06CH11357.

Notes

^†The submitted manuscript has been created by UChicago Argonne LLC, Operator of Argonne National Laboratory, (‘Argonne’). Argonne a US Department of Energy Office of Science Laboratory, is operated, under Contract No. DE-AC02-06CH11357 with the U.S. Department of Energy. The U.S. Government retains for itself, and others acting on its behalf, a paid-up, nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicaly and display publicly, by or on behalf of the Government.