A series of experiments is described which were conducted to measure the absolute spectral irradiances laser plasmas created from metal targets over wavelength region 123–164 nm by two separate 1.0 μm lasers, i.e., using 100 Hz, 10 ns, 2–20 kHz, 60–100 ns full-width-at-half-maximum pulses. maximum radiation conversion efficiency ≈3%/2πsr measured a ≈125 160 nm. developed collisional-radiative s...