English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a combined experimental and theoretical study on thephotodissociation dynamics of ion-pair formation in O$_2$ following resonanttwo-photon absorption of a 9.3 eV femtosecond pulse, where the resulting O$^+$ions are detected using 3-D momentum imaging. Ion-pair formation states of$^3\Sigma^-_g$ and $^3\Pi_g$ symmetry are accessed through predissociation ofoptically dark continuum Rydberg states converging to the B $^2\Sigma^-_g$ionic state, which are resonantly populated via a mixture of bothparallel-parallel and parallel-perpendicular two-photon transitions. Thismixture is evident in the angular distribution of the dissociation relative tothe light polarization, and varies with the kinetic energy release (KER) of thefragmenting ion-pair. The KER-dependent photoion angular distribution revealsthe underlying two-photon absorption dynamics involved in the ion-pairproduction mechanism and indicates the existence of two nearly degeneratecontinuum resonances possessing different symmetries, which can both decay bycoupling to ion-pair states of the same total symmetry through internalconversion.

journal of chemical physics online/the journal of chemical physics/journal of chemical physics

Distinguishing resonance symmetries with energy-resolved photoion  angular distributions from ion-pair formation in O$_2$ following two-photon  absorption of a 9.3 eV femtosecond pulse