Date of Thesis

Spring 2018

Thesis Type

Honors Thesis (Bucknell Access Only)

Degree Type

Bachelor of Science

Major

Chemistry

Minor, Emphasis, or Concentration

Physics

First Advisor

Karen J. Castle

Keywords

carbon dioxide, vibrational energy transfer, rate coefficient, non-LTE

Abstract

A laboratory measurement of the overall self-quenching rate of symmetric stretch excited carbon dioxide, CO2 (1000), was performed. A perturbation-relaxation experiment was used in order to make this measurement. A temperature-jump was used to populate the symmetric stretching state and transient diode laser absorption spectroscopy was used to monitor the change in population with time and therefore the rate of collisional energy exchange. The overall rate of relaxation of carbon dioxide through collisions with other carbon dioxide molecules was determined to be (2.9 ± 0.3) × 10-11 cm3/s. This overall rate coefficient provides a new upper limit, which is smaller than previously measured, for the individual self-quenching rates involving the (1000) state.

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