Functional dependencies of the Cu XXVIII line power output coincident with a nuclear transition in 169Tm

The feasibility of using the He-α line of Cu XXVIII at 8.394 keV to pump the 8.410-keV nuclear transition from the ground level to the (3/2)+ level in 169Tm is examined using a collisional-radiative-equilibrium plasma atomic model. Numerical calculations of the He-α line power output are presented for various density, temperature, and size conditions for both laser-imploded and Z-pinch plasmas. The interplay between the density, opacity broadening, and the radiating surface area in overcoming the 16 eV difference in transition energies is analyzed.