Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources

Details Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4747..359m&link_type=abstract

Proc. SPIE Vol. 4747, p. 359-364, International Conference on Atomic and Molecular Pulsed Lasers IV, Victor F. Tarasenko; Georgy

Physics

Scientific paper

The additional processes of excitation of B2(Sigma) +1/2-state of HgBr and HgCl excimer molecules in gas-discharge plasma on HgBr2/HgCl2/He and HgBr2/HgCl2/N2/He mixtures have been investigated (together with dissociation of mercury dihalides by electronic shock, which is the basic process. The pumping of working mixtures was implemented by high- frequency (f equals 1000 Hz) barrier and surface discharges of nanosecond duration (approximately 100 ns), taking place simultaneously. The essential increase in the amplitude (up to 3 times), radiation pulse duration (up to 2 times) and their back edge (up to 15 times) has been revealed with the addition of molecular nitrogen in the HgBr2/HgCl2/He working mixture, and also the difference in value of amplitudes of the first, second and third pulses have been revealed. It has been established, that the change in temporary radiation parameters is caused by the transfer of energy from molecular nitrogen in metastable state A3(Sigma) +u at collisions with molecules of mercury dihalides. One more additional process, increasing the amplitude of the second and third radiation pulses both in the HgBr2/HgCl2/He mixtures, and in the HgBr2/HgCl2/N2/He mixtures is the excitation of the HgBr(X2(Sigma) +1/2) and HgCl(X2(Sigma) +1/2) radicals in the B2(Sigma) +1/2-state by the electrons.

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