stancil@hal.physast.uga.edu.
Charge transfer (also called charge exchange or electron capture) occurs in a very large range of astrophysical, atmospheric, and heliospheric environments. It can be decisive in establishing the ionization structure, energy transfer, and inducing IR to x-ray radiative relaxation. However, little comprehensive data exist for complex projectile ions with more than 1 electron. 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, or higher, 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. Tabulations of cross sections and rate coefficients will be provided. 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 are available which we assembled under a 1999 grant from the NASA AISPR program. New data are currently be added to the website and its functionally extended.
Special thanks to Mark E. Bannister (ORNL) for developing an early version of the PERL/JavaScript interface on which this website is based and Jianbo Z. Stancil for assistance with PERL/JavaScript programming.
This project is supported by NASA through the Astrophysics Data and Analysis Program, Grant NNX13AF31G.
Send comments to Phillip Stancil at stancil@hal.physast.uga.edu.
Last Modified: Nov. 25, 2014.