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Title:OBSERVATION OF LEVEL-SPECIFIC PREDISSOCIATION RATES IN S1 ACETYLENE
Author(s):Saladrigas, Catherine A.
Contributor(s):Field, Robert W; Jiang, Jun
Subject(s):Small molecules
Abstract:A new spectroscopic scheme was used to gain insight into the predissociation mechanisms of the S$_1$ electronic state of acetylene in the 47000-47300 cm$^{-1}$ region. To study this mechanism, H-atom action spectra of predissociative S$_1$ were recorded. Instead of detecting H-atom via REMPI, an H-atom fluorescence scheme was developed, in which the H-atom was excited to 3s and 3d levels and the fluorescence was detected. The signal-to-noise ratio of H-atom fluorescence-detected action spectra is superior to REMPI detected H-atom spectra. By comparing the LIF and H-atom spectra, there is direct evidence of level-dependent predissociation rates. Some of the line-widths observed in the H-atom spectra are broader than in the LIF spectra, confirming the triplet-mediated nature of S$_1$ acetylene.
Issue Date:26-Jun-15
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:ACS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/79181
Date Available in IDEALS:2016-01-05


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