Abstract:
For the first time, atomic single-bubble sonoluminescence of Yb in a colloidal suspension in dodecane of SiO$_2$ nanoparticles containing YbCl$_3$ was recorded. A spectrum was obtained containing Yb, Yb$^+$ lines in the region of 300–550 nm, together with SiO lines, due to the entry of nanoparticles into the bubble during sonolysis of the suspension. The lower limit of determination of ytterbium in the initial aqueous solution of YbCl$_3$ used for depositing onto nanoparticles, according to the intensity of the analytical line at 399 nm in this spectrum, is 3$\cdot$10$^{-3}$ mol/l. By comparing the experimental and temperature-dependent calculated spectra of ytterbium, we found the electronic temperature in the nonequilibrium plasma that arises during bubble collapse, where Yb atoms emit light: $T_e$ = 7000 $\pm$ 500 K.
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