A vibro-rotational analysis has been performed of the second positive system (SPS) of N2 and of the first negative system (FNS) of N+2 emitted by 35 MHz discharges in flowing nitrogen operated at pressures of 5–50 torr and power densities of the order of 1–10 W-cm-3. The distributions of the vibrational and of the rotational levels follow Boltzmann's law in both the SPS and the FNS with Tv = 4000°K and TR = 2800°K for the N2(C3Πu) state and Tv = 5100°K and TR = 5800°K for the N+2(B2Σ+g) state and independent of pressure. Kinetic gas temperatures are between 1200 and 2000°K and increase with pressure; electron temperatures are in the range 15,000–9,500°K. The reversal of line intensities of the SPS and of the FNS observed with increasing pressure has been tentatively interpreted. Possible chemical implications of these results have been examined
Spectroscopic diagnostics of R.F. discharges at moderate pressures as chemical applications. I. Pure Nitrogen / Cramarossa, Francesco; Ferraro, Giovanni; Molinari, Ettore. - In: JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER. - ISSN 0022-4073. - STAMPA. - 14:6(1974), pp. 419-436. [10.1016/0022-4073(74)90046-6]
Spectroscopic diagnostics of R.F. discharges at moderate pressures as chemical applications. I. Pure Nitrogen
Giovanni Ferraro;
1974-01-01
Abstract
A vibro-rotational analysis has been performed of the second positive system (SPS) of N2 and of the first negative system (FNS) of N+2 emitted by 35 MHz discharges in flowing nitrogen operated at pressures of 5–50 torr and power densities of the order of 1–10 W-cm-3. The distributions of the vibrational and of the rotational levels follow Boltzmann's law in both the SPS and the FNS with Tv = 4000°K and TR = 2800°K for the N2(C3Πu) state and Tv = 5100°K and TR = 5800°K for the N+2(B2Σ+g) state and independent of pressure. Kinetic gas temperatures are between 1200 and 2000°K and increase with pressure; electron temperatures are in the range 15,000–9,500°K. The reversal of line intensities of the SPS and of the FNS observed with increasing pressure has been tentatively interpreted. Possible chemical implications of these results have been examinedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
