Densification and reactivity enhancement during the ignition of nuclear weapons. Pt. 1

An analytical approximation is presented to describe the strongly convergent densification shock front in an ideal gas. With the model of an ideal medium, which is compressed with constant velocity at the boundary, and the similarity characteristics of the shock wave front it is assumed, that all particles move independently with their velocities obtained in the shock wave front. With this assumption, which primarily is valid for an implosion shock, the hydrodynamic equations can be solved analytically to give a simple description of the total flow field. For the case of the spherically symmetric compression shock the results are presented for different adiabate coefficients. (orig.)