Dissociative photoionization study of O2
Dissociative photoionization of O2 is studied by an energy–mass analyzing system and synchrotron radiation. The kinetic energy distribution spectra of the O+ ion fragments and the dissociative photoionization efﬁciency curves for the O+ fragments with zero and 0.8 eV kinetic energies are observed at photon energies from 18.5 to 24.7 eV. Two vibrational progressions are observed in the zero kinetic energy O+ spectrum and identiﬁed as Rydberg series nsơg (n = 4 and 5) converging to the 32IIu ionic state of O2. The spectroscopic constants for these Rydberg states are obtained. Post dissociative autoionizations are observed for the O*(2P)ndn(n = 3~5) atomic states in the zero kinetic energy O+ spectrum. A shape resonance structure for the B2S− G ionic state is observed in the 0.8 eV kinetic energy O+ spectrum. The related dissociation mechanisms are discussed.
Analytical Chemistry | Atomic, Molecular and Optical Physics | Biological and Chemical Physics | Elementary Particles and Fields and String Theory | Physical Chemistry
Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited
He, Z. X.,
Cutler, J. N.,
Southworth, S. H.,
Stolte, W. C.,
Samson, J. R.
Dissociative photoionization study of O2.
Journal of Electron Spectroscopy and Related Phenomena, 94(1-2),