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UV and VUV radiation of rare gases and nitrogen in diffuse discharges, formed in an inhomogeneous electric field

In this report we carry out additional studies of the VUV and UV emission of diffuse discharges formed by sub-nanosecond voltage pulses in rare gases and nitrogen. As a result, the optimal conditions for lasing on the second positive nitrogen system were determined and the data were obtained on of Ar2* and Xe2* emission both in diffuse and contracted discharges. The data obtained are consistent with the results of our previous work and fundamentally differ from the spectral measurements described in some reports. Besides, parameters of the spontaneous and stimulated emission on the nitrogen second positive system and the conditions in which the emission is observed in is very different from the conditions under which this radiation has been usually produced.