The line ratios between dielectronic recombination satellites and the w-resonance are analyzed as a function of plasma temperature for temperature diagnostics. The n=2—1 spectral emission pattern of heliumlike argon

together with the associated satellite emission originating from lithiumlike argon have been measured with x-ray elliptical curved crystal spectrometer on Yang accelerator. Experimental results using curved Mica crystal analyzer are described and show spectrum of argon-puff Z-pinch plasma. Spectra showing the He-like resonance line w and the satellites j

k

q

the magnetic quadrupole M2 line

the intercombination line y

the forbidden line z and a cold Kα line of argon were recorded with X-ray film. The line ratios between dielectronic recombination satellites ( j+z

k) and the w-resonance line were found and a good agreement between the theoretical models and the experimental results

supporting the method of line-ratio measurement as a temperature diagnostic for plasmas.