Bound-free gas transport coefficients via the time correlation formulationbased on an atomic picture

The values of gas transport coefficients, when both unbound particles and b ound pairs are present, are standardly accounted for by treating the gas as a mixture of free atoms and bound pairs and using the well-known expressio ns for the transport coefficients for a mixture. But since the bound pairs consist of two atoms, it should also be possible to start from a purely ato mic picture of the gas. This paper accomplishes that aim, starting with the time correlation function expression for the transport coefficient in term s of atomic variables. (C) 1999 American Institute of Physics. [S0021-9606( 99)50117-7].