The spatial and temporal distribution of the energy deposited by a fast deuteron in a hot deuterium plasma is calculated taking into account energy loss to thermal ions by scattering that results from elastic nuclear processes in addition to the usual Coulomb interaction with thermal electrons and ions. The method of calculation and the approximations involved are discussed, and numerical results are given for a deuterium plasma at normal liquid density. For plasma electron temperatures above approximately 10 keV, the effect of including nuclear processes ind‐dscattering is to cause the energy of a fast deuteron to be deposited nearer to its point of origin in space and time with relatively more energy going directly to ions.