  The absolute electron capture cross sections for single and double charge
exchanges between the highly charged ions O6+ and CO2, CH4, H2, N2, the
dominant collision processes in the solar wind, have been measured in the
energy from 7 keV*q (2.63 keV/u) to 52 keV*q (19.5 keV/u). These measurements
were carried out in the new experimental instrument set up at Fudan University,
and the error of cross sections for single and double charge exchanges at the
1{\sigma} confidence level are about 11% and 16%, respectively. Limited
agreement is achieved with single electron capture results calculated by the
classical over-barrier model. These cross sections data are useful for
simulation ion-neutral processes in astrophysical environments and to improve
the present theoretical model of fundamental atomic processes.
