The yield of O2(b1Σ+g,υ=O) produced by quenching of O2(A3Σ+u,υ=8) by O2

Electronically excited molecular nitrogen and molecular oxygen in the high-latitude upper atmosphere

“…There is a pronounced wavelength shift of maximal intensity in the region of lower wavelengths. This result is in good agreement with conclusions of Benesch (1981Benesch ( , 1983) that collisional processes could be responsible for the change in the colour in the lower border of the type B aurora.…”

“…So there is a movement of the band of maximal intensity from the infrared to the red region with the increase in the density of the atmosphere. This fact is in good agreement with the conclusions of Benesch (1981Benesch ( , 1983.…”

“…In several papers (Rotem et al, 1981(Rotem et al, , 1982Sadeghi and Setser, 1981;Bachmann et al, 1992Bachmann et al, , 1993 it was shown for laboratory conditions that there is a collisional coupling between the B 3 g state and triplet A 3 + u , W 3 u , B 3 − u states. A similar coupling between the b 1 + g state and Herzberg states of O 2 was studied in (Bednarek et al, , 1997Shiau et al, 1998;Kalogerakis et al, 2000;Pejakovic et al, 2003). Moreover, Kamaratos (1997Kamaratos ( , 2005aKamaratos ( , b, 2006 has established the enhancement of N 2 (B 3 g , v) production in flowing nitrogen afterglows in the case of the addition of discharged O 2 .…”

“…However, a dependence of 1PG emission intensities on atmospheric density is important in problems related to the production of red lower border of auroral arcs (Benesch, 1981(Benesch, , 1983Morrill and Benesch, 1996), a movement of the electronic excitation to the lowest vibrational levels of the B 3 g state in laboratory afterglow (Pravilov et al, 1988;Piper, 1994), a change in relative population of the B 3 g state at different altitudes in sprites (Morrill et al, 1998;Bucsela et al, 2003). Benesch (1981Benesch ( , 1983 has suggested that the change in the colour of the lower border in the type B aurora from red to deep crimson could be related to an increased collision frequency in lower thermosphere. He has considered a wavelength shift of the relative intensities of the 1PG v=3 sequence from normal auroral observations to results of laboratory measurements made at the pressure of ∼1 Torr.…”

Diffusion of Excited Neutral Particles: Basic Studies and Potential Applications

“…In this interpretation, the longer diffusion time is merely a consequence of the energy residing in several different excited states, with one of the states having a significantly larger size and therefore diffusing more slowly. It should be pointed out that intersystem crossings similar to those involved in the above discussion have been observed in CO (Lavollée and Tramer 1979) and O 2 (Bednarek et al . 1994).…”