The vibrational deactivation of the (00o1) and (0110)

Siddles, R.M.; Wilson, Gerard J.; Simpson, C.J.S.M.

doi:10.1016/0301-0104(94)00324-6

Cited by 14 publications

(2 citation statements)

References 37 publications

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“…39 The vibrational radiative emission has been found to have radiation lifetimes higher than one second (see tables S8 and S9 of SI). On the other hand, the vibrational-translational relaxation due to collisions with surrounding atmospheric molecules has lifetimes of the order s [40][41][42] at the upper tropospheric/stratospheric pressures of about 0.1 atm. 43 Hence, the dominant quenching mechanism in this atmospheric environment is not radiative emission, but the collision of hot CO 2 and N 2 O with the surrounding molecules.…”

Section: Ht and Ct In The Reactions Of N 2 O + With H 2 Omentioning

confidence: 99%

Formation of H3O+ and OH by CO2 and N2O trace gases in the atmospheric environment

Satta

Cartoni

Catone

et al. 2023

Preprint

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The impact of cosmic rays’ energetic subatomic particles on climate and global warming is still controversial and under debate. Cosmic rays produce ions that can trigger fast reactions affecting chemical networks in the troposphere and stratosphere especially when a large amount of relevant trace gases such as carbon dioxide, methane, sulfur dioxide and water are injected by volcanic eruptions. This work focuses on synchrotron experiments and an ab initio theoretical study of the ion chemistry of carbon dioxide and nitrous oxide radical cations reacting with water. These molecules catalyze a fast exothermic formation of hydronium ions H3O+ and the hydroxyl radical OH, the main oxidant in the atmosphere. Moreover, theoretical calculations demonstrate that at the end of the catalytic cycle, CO2 and N2O are produced vibrationally excited and subsequently they quench in the microsecond time scale by collision with the surrounding atmospheric molecules at the pressure and temperature of upper-troposphere/stratosphere. The chemistry involved in these reactions has a strong impact on the oxidant capacity of the atmosphere, on the sulfate aerosol production, on the cloud formation and eventually on the chemical networks controlling climate and global warming models.

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Section: Ht and Ct In The Reactions Of N 2 O + With H 2 Omentioning

confidence: 99%

Formation of H3O+ and OH by CO2 and N2O trace gases in the atmospheric environment

Satta

Cartoni

Catone

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…39 The vibrational radiative emission has been found to have radiation lifetimes higher than one second (see Tables S8 and S9 of ESI †). On the other hand, the vibrational-translational relaxation due to collisions with surrounding atmospheric molecules has lifetimes of the order ms [40][41][42] at the upper tropospheric/stratospheric pressures of about 0.1 atm. 43 Hence, the dominant quenching mechanism in this atmospheric environment is not radiative emission, but the collision of hot CO 2 and N 2 O with the surrounding molecules.…”

Section: Ht and Ct Products In The Reactions Of Comentioning

confidence: 99%