Photodissociation Dynamics In Titan's Atmosphere

<p>Photodissociation dynamics of molecules relevant to understanding Titan's atmosphere (diacetylene, cyanoacetylene and heptane isomers) are carried out under collisionless condition using the DC slice imaging technique. In diacetylene photodissociation, two-photon processes dominate at 243 nm and 212 nm whereas at 121.6 nm, a one-photon dissociation process dominates. Direct measurement of the lifetime of metastable triplet diacetylene confirms sub-microsecond lifetimes. Photodissociation of cyanoacetylene at 193.3 nm proceeds on the S1 potential energy surface with an exit barrier. In heptane photodissociation, the dissociation occurs on the ground state or low-lying triplet states with nonradiative electronic relaxation. Time-of-flight mass spectroscopy studies in this system yield the relative ionization efficiencies of 1- and 2-butyl and propyl radicals at 157 nm.</p>

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Open Access Dissertation

Discipline thesis:degree_discipline

Chemistry

Year dc:date.available

2010

Author dc:creator

• Silva, Welvidanalage Ruchira

Contributors dc:contributor

• Arthur G. Suits

• Cyanoacetylene
• DC Slice Imaging
• Diacetylene
• Heptane
• Photodissociation
• Titan
• Physical Chemistry

Repository record dc:identifier

https://digitalcommons.wayne.edu/oa_dissertations/63

OAI identifier oai:identifier

oai:digitalcommons.wayne.edu:oa_dissertations-1062