Slipping surface discharge as a source of hard UV radiation

The UV-spectrum of a high-current slipping surface discharge radiation has been investigated experimentally by means of a liquid chemical actinometry technique. The photon fluxes emitted in the hard UV ( <190 nm) and soft UV (190 nm< <430 nm) regions were determined by the H2 O2yield in irradiated distilled water and by the Fe II yield in an irradiated solution of K3 Fe(C2 O4 )3 , respectively. The results obtained lead to the conclusion that the spectrum differs from the Planckian one by the presence of an `enriched' short-wavelength ( <190 nm) component.