The plasma conditions of Ni like Ag, Cd, In, Sn, Sb, and Ne like Fe, Co, Ni, Cu, Zn x ray lasers are numerically simulated, using a one dimensional hydrodynamic code.

Ne-like Ge 19.6 nm X-ray laser driven by 2ω1ω pumping scheme;

Theoretical designs of 19.6nm Ne-like Ge XRL source;

Test of simulation by experiments of Ne-like Ge X-ray lasers;

The energies of Ne-like copper were calculated inthe relativistic multi-configuration Dirac-Fock(MCDF) approximate method.