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

Time-resolved Fourier transform IR emission spectroscopy, capable of 10 -8  s and 0.1 cm -1  spectral resolution, has been used to study the collisional deactivation of highly vibrationally excited SO 2  by bath-gas molecules Ar, N 2 , O 2 , CO 2  and SF 6 . The vibrationally excited SO 2  were initially prepared with 32,500 cm -1  energy in the X˜ 1 A 1  state by the pulsed 308 nm laser excitation followed by internal conversion. The entire collisional deactivation process of the excited SO 2  was monitored by time-resolved IR emission spectra through the IR active transitions. The average energy, &lt;E&gt;, of excited SO 2  was extracted from the IR emission bands using known vibrational constants and selection rules. &lt;E&gt;is further used to derive the average energy loss per collision, &lt;E&gt;, by each of the bath-gas molecules. The results show that &lt;E&gt; increases from mono- and di-atomic quenchers to more complex polyatomic molecules, as V-V energy transfer contributes to V-T/R. For all bath molecules, &lt;E&gt; increases with &lt;E&gt; and displays a marked increase at &lt;E&gt; ≈ 20,000 cm-1. The observed threshold behavior most likely arises from intramolecular vibronic coupling within SO 2  and implies the importance of long range interaction in intermolecular energy transfer.

Collisional Deactivation of Highly Vibrationally Excited SO 2 : A Time-Resolved FTIR Emission Spectroscopy Study