Absolute charge transfer cross sections for the state-selected reactions O+(2D,2P)+O2

Absolute total cross sections for O2+ formed by state-selected charge transfer collisions of O+(2D,2P)+O2 have been measured in the center-of-mass kinetic energy range of ≈0.1–40 eV. The charge-transfer cross sections for O+(2P) are found to be significantly higher than those for O+(2D), which in turn are higher than those for O+(4S) in this kinetic energy range. This experiment indicates that the charge transfer reactions O+(2D,2P)+O2 are a major source of O2+ and must be taken into account in a reliable modeling of the ion chemistry in planetary ionospheres.

[1]  C. Ng.  State-Selected and State-to-State Ion−Molecule Reaction Dynamics , 2002 .

[2]  L. H. Andersen,et al.  The Source of Green Light Emission Determined from a Heavy-Ion Storage Ring Experiment , 1997 .

[3]  C. Ng,et al.  State selection of O+(4So,2Do,2Po) using resonance dissociative charge transfer of He+(Ne+, Ar+)+O2 and radio frequency multipole ion guide techniques , 1995 .

[4]  C. Ng,et al.  A differential retarding potential method for improving ion-beam kinetic energy resolution , 1994 .

[5]  C. Ng,et al.  Unimolecular and bimolecular ion-molecule reaction dynamics , 1994 .

[6]  Ian Powell,et al.  WINDII, the wind imaging interferometer on the Upper Atmosphere Research Satellite , 1993 .

[7]  Y. Sahai,et al.  Equatorial f-region oi 6300 å and oi 5577 å emission profiles observed by rocket-borne airglow photometers , 1990 .

[8]  Marsha R. Torr,et al.  The role of metastable species in the thermosphere , 1982 .

[9]  A. Dalgarno.  Atomic Physics from Atmospheric and Astrophysical Studies , 1979 .

[10]  M. Bowers.  Gas phase ion chemistry , 1979 .

[11]  H. P. Palenius,et al.  Absolute cross section for photoionization of atomic oxygen , 1978 .

[12]  D. Torr,et al.  The effect of N2 + recombination on the aeronomic determination of the charge exchange rate coefficient of O+(²D) with N2 , 1978 .

[13]  R. Henry.  Photoionization Cross-Sections for Atoms and Ions of Carbon, Nitrogen, Oxygen, and Neon , 1970 .

[14]  R. Stebbings,et al.  Low-energy collisions between some atmospheric ions and neutral particles , 1966 .

[15]  D. R. Bates,et al.  The basic reactions in the upper atmosphere II. The theory of recombination in the ionized layers , 1947, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[16]  G. Herzberg.  Molecular Spectra and Molecular Structure IV. Constants of Diatomic Molecules , 1939 .

[17]  JOSEPH KAPLAN,et al.  Light of the Night Sky , 1931, Nature.

[18]  W. W. Campbell.  Note on the Spectrum of the Aurora Borealis , 1895 .