Energetic Oxygen in the Upper Atmosphere and the Laboratory

The study of intermolecular energy transfers in electronic energy quenching for molecular collisions N<sub>2</sub>-N<sub>2</sub>, N<sub>2</sub>-O<sub>2</sub>, O<sub>2</sub>-O<sub>2</sub>

“…We have continued the calculation of quenching rate coefficients for a 1 g and b 1 + g states in collisions with O 2 (X 3 − g ), started in Kirillov (2004b) for high vibrational levels of these states. The results of the calculation have shown an excellent agreement with all experimental data available in a review by Slanger and Copeland (2003). It is indicative of the fact that intermolecular transfers with the production of singlet oxygen (processes 6a, 7a, 7b) are dominant in the electronic quenching for considered intervals of vibrational levels of the metastable states.…”

“…The results of our calculation for vibrational levels v=1-25 of the a 1 g state and v=1-20 of the b 1 + g state at temperatures of 155 and 300 K are compared in Figs. 10 and 11 with the experimental data by Hwang et al (1998), Bloemink et al (1998, Kalogerakis et al (2002), Slanger and Copeland (2003) obtained at room temperature and the experimental data by Amaral et al (2002), Slanger and Copeland (2003) obtained at a temperature of 155 K. It is seen from Figs. 10 and 11 that there is good agreement between the calculated rate coefficients and experimental data for low and high vibrational levels for both states.…”

Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

“…Photodesorbed O͑ 3 P J=2,1,0 ͒ atoms were ionized by the 2 + 1 REMPI transition via the O͑ 3 P J -3 P J ͒ transition at 225.6-226.4 nm. 17 We tried to search for REMPI signals of oxygen molecules in the higher electronically excited states, i.e., b 1 ⌺ g + , c 1 ⌺ u − , and 5 ͟ g using the REMPI transitions reported by Morrill et al 32 and Slanger and Copeland, 33 but no evidence for these products was obtained.…”

Use of O<sub>2</sub> airglow for calibrating direct atomic oxygen measurements from sounding rockets

“…The recombination reaction has an exothermicity of 5.12 eV which mainly resides in the newly formed O 2 molecule, the so called precursor state of the molecular and atomic oxygen nightglow emissions. With this available energy high vibrational levels of the ground state or any of the five bound states, may be formed (Slanger and Copeland, 2003). The energy levels of these states are shown in Fig.…”