Emission spectra of heavy inert gases Kr, Xe in the range 3–20 nm under pulsed laser excitation using various gas jets as targets

The article considers the results of studies of the emission spectra of Kr, Xe upon excitation by pulsed laser radiation. We used Nd: YAG laser, $\lambda$ = 1064 nm, $\tau$ = 5 ns, and $E_{\operatorname{pulse}}$ = 0.8 J. The spectral range of 30–200A was studied. We used capillary with $d$ = 500 $\mu$m and supersonic conical nozzles with $d_{\operatorname{cr}}$ = 145 $\mu$m, 2$\alpha$ = 12$^\circ$, $L$ = 5 mm, and $d_{\operatorname{cr}}$ = 540 $\mu$m, 2$\alpha$ = 11$^\circ$, $L$ = 5 mm to form a gas jet. The emission spectra for various gas targets were obtained, the obtained spectra were deciphered, and the ions emitting in this spectral range were determined. We observed that with increasing particle concentration in the zone of laser spark, the radiation intensity increases. In this case, the intensity of ion lines with high degrees of ionization increases faster.