In a dense and hot plasma the refractive index in the x-u.v, range is
caused by free electrons as well as by bound electrons. The refractive
index is calculated by the Kramer-Kronig relations using the total op
acity of the medium including bound-bound, free-bound and free-free at
omic transitions. A simple method is presented of calculation of the e
mission and absorption coefficients which are of central importance to
the study of radiative transfer in a dense and hot material. The comp
uter program using a screened hydrogenic model allows one to obtain in
either LTE or NLTE, the values of these coefficients for an arbitrary
material over a wide range of mass density and temperature. Applicati
ons are presented first to generate opacity and emissivity tables used
by hydrocodes including radiative transfer and second to generate the
index of refraction of dense media. These calculations can provide a
modelling for experiments by allowing the study of the structure of pl
asmas created by laser deposition and the evolution through the heat c
onduction.