"2"^^ . . . . "Soural, Ivo" . . "2009-06-29+02:00"^^ . . "RIV/00216305:26310/09:PU84033" . "[A3A8D00C6B97]" . "Guerra, Vasco" . "Lino da Silva, M." . . "Proceedings of 36th European Physical Society Conference on Plasma Physics" . "The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge" . . "4"^^ . "In this work we have used optical emission spectroscopy to measure the (2-0) 1st positive system emission in nitrogen DC discharge at pressure p=1000 Pa, for discharge currents in the range I=50-200 mA, in a Pyrex tube with internal diameter (2R)=13 mm. It is shown that an important difference in behaviour occurs when the discharge current is increased from 50 to 70 mA. As a matter of fact, at 50 mA the pink-afterglow, characterized by the raise in the optical emission after a dark zone, does not exist, only the well known yellow-afterglow being visible. The former is a result of the vibration-vibration (V-V) up-pumping followed by vibration-to-electronic (V-E) energy exchanges, whereas the latter is a result of 3-body N-atom recombination. However, for 70 mA and higher currents the pink-afterglow exists and gets more noticeable as the current increases." . "P(GA202/08/1106), P(GD104/09/H080)" . . "26310" . "nitrogen pink afterglow, numeric simulation, optical emission spectroscopy"@en . "The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge"@en . "RIV/00216305:26310/09:PU84033!RIV10-GA0-26310___" . . . "EPS" . "2-914771-61-4" . "Sofia" . . "Sofia" . . "The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge"@en . "318791" . "Kr\u010Dma, Franti\u0161ek" . "5"^^ . . "S\u00E1, Paul" . . "The Importance of the Discharge Current in the Formation of the Pink Afterglow of a Nitrogen DC Discharge" . "In this work we have used optical emission spectroscopy to measure the (2-0) 1st positive system emission in nitrogen DC discharge at pressure p=1000 Pa, for discharge currents in the range I=50-200 mA, in a Pyrex tube with internal diameter (2R)=13 mm. It is shown that an important difference in behaviour occurs when the discharge current is increased from 50 to 70 mA. As a matter of fact, at 50 mA the pink-afterglow, characterized by the raise in the optical emission after a dark zone, does not exist, only the well known yellow-afterglow being visible. The former is a result of the vibration-vibration (V-V) up-pumping followed by vibration-to-electronic (V-E) energy exchanges, whereas the latter is a result of 3-body N-atom recombination. However, for 70 mA and higher currents the pink-afterglow exists and gets more noticeable as the current increases."@en . . . . .