The ratio V = ρ ρ e / ρ ρ is defined by using ρ ρ e , which is the density of the explosive (solid part) and ρ ρ , which is the density of the detonation products. The parameters A , B , R 1 , R 2 and ω ω are given by several references. In addition, the initial density (solid part) ρ ρ 0 , speed of detonation V D , Chapman–Jouguet pressure P C J and the chemical energy per unit volume of the explosive e 0 are given in such references. These parameters are obtained by fitting the JWL-EOS to experimental results. Typical parameters for some explosives are listed in the table below.