The photodissociation of NO(2) by visible and ultraviolet light. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2010

The photodissociation of NO(2) by visible and ultraviolet light.

Résumé

We present velocity map images of the NO, O((3)P(J)) and O((1)S(0)) photofragments from NO(2) excited in the range 7.6 to 9.0 eV. The molecule was initially pumped with a visible photon between 2.82-2.95 eV (440-420 nm), below the first dissociation threshold. A second ultraviolet laser with photon energies between 4.77 and 6.05 eV (260-205 nm) was used to pump high-lying excited states of neutral NO(2) and/or probe neutral photoproducts. Analysis of the kinetic energy release spectra revealed that the NO photofragments were predominantly formed in their ground electronic state with little kinetic energy. The O((3)P(J)) and O((1)S(0)) kinetic energy distributions were also dominated by kinetically 'cold' fragments. We discuss the possible excitation schemes and conclude that the unstable photoexcited states probed in the experiment were Rydberg states coupled to dissociative valence states. We compare our results with recent time-resolved studies using similar excitation and probe photon energies.

Dates et versions

hal-00808090 , version 1 (04-04-2013)

Identifiants

Citer

Iain Wilkinson, Ivan A. Garcia, Benjamin J. Whitaker, Jean-Benoît Hamard, Valérie Blanchet. The photodissociation of NO(2) by visible and ultraviolet light.. Physical Chemistry Chemical Physics, 2010, 12 (48), pp.15766-79. ⟨10.1039/c0cp01551b⟩. ⟨hal-00808090⟩
135 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More