Charge transfer, occurring in a very large range of astrophysical environments, can be decisive in establishing ionization structure, energy transfer, and inducing IR to x-ray radiative relaxation. However, little comprehensive data exist for complex projectile ions or targets more complex than atomic hydrogen. Therefore, the aim of this website is the development of an on-line database of charge transfer reactions of astrophysically important atomic ions Xq+ (X = H - Zn, q = 1 - 6) with H, He, various metal atoms, H2, and other selected molecular targets. In some instances, charge states up to q=16 will be included. Existing theoretical and experimental cross section and rate coefficient data, many produced by the investigators and their collaborators, will be compiled and critically evaluated. Data for many reactions missing in the literature will be estimated utilizing nonadiabatic models. Fits to cross sections and rate coefficients using standard functions will be provided as well as tabulations of the raw data. The results will be made readily available on the website and ease-of-use for astrophysical modeling will be emphasized.
This project is in the very early stages. Only He and some H, H2, CO, H2O, and CO2 data is available. New data will appear periodically.
Special thanks to Mark E. Bannister (ORNL) for developing the PERL/JavaScript interface on which this website is based and Jianbo Z. Stancil for assistance with PERL/JavaScript programming and data entry.
This project is supported by NASA through the Applied Information Systems Research Program, NRA-98-OSS-03.
Send comments to Phillip Stancil at 
stancil@hal.physast.uga.edu.
Last Modified: May 16, 2002.