• Login
    View Item 
    •   BEARdocs Home
    • Graduate School
    • Electronic Theses and Dissertations
    • View Item
    •   BEARdocs Home
    • Graduate School
    • Electronic Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Off-axis cavity ring down spectroscopy with exponential and phase shift detection : absorption spectra of weak transitions at low temperatures.

    Thumbnail
    View/Open
    Yasnahir_Perez-Delgado_phd.pdf (11.34Mb)
    Document (3.015Mb)
    Access rights
    Worldwide access
    Date
    2009-08-25
    Author
    Perez-Delgado, Yasnahir Z.
    Metadata
    Show full item record
    Abstract
    In this dissertation the ability of the off-axis laser injection in cavity ring down experiments is shown. Modulated continuous wave and pulsed lasers are used to obtain the absorption spectra of weak transitions at low temperatures. The absorption spectra of the red atmospheric bands of O₂ (A-band and γ-band), the overtone (Δυ =4) band of HD and the C-H (Δυ = 4, 5 and 6) overtone spectra of polyatomic molecules (C₂H₆, CH₂D₂, CHD₃, C₃H₄, C₆H₁₀ and C₅SiH₁₀) are presented. The integrated absorption of each band was calculated as a function of the density of the gas samples and used to obtain the band strength of these weak transitions. In addition, the Fourier-transform (IR and NIR) spectra between 2500 and 13000 cm⁻­­­¹ are presented for CH₃D, CHD₃, C₆H₁₀ and C₅SiH₁₀. The local mode harmonic frequency and anharmonicity were obtained. The harmonically coupled anharmonic oscillator (HCAO) model was used to calculate energy levels and assign the absorption bands to particular transitions of CH₃D, C₆H₁₀ and C₅SiH₁₀. Also, overtone intensities of CHD₃ were calculated using ab initio quantum mechanical methods and compared with the experimental data. Spectral simulations were performed in order to confirm the transitions and the temperature of the molecules in the cell. Lastly, photolysis of ethyl acetate via high vibrational overtone absorption is proposed.
    URI
    http://hdl.handle.net/2104/5389
    Department
    Chemistry and Biochemistry.
    Collections
    • Electronic Theses and Dissertations

    Copyright © Baylor® University All rights reserved. Legal Disclosures.
    Baylor University Waco, Texas 76798 1-800-BAYLOR-U
    Baylor University Libraries | One Bear Place #97148 | Waco, TX 76798-7148 | 254.710.2112 | Contact: libraryquestions@baylor.edu
    If you find any errors in content, please contact librarywebmaster@baylor.edu
    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    TDL
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Statistics

    View Usage Statistics

    Copyright © Baylor® University All rights reserved. Legal Disclosures.
    Baylor University Waco, Texas 76798 1-800-BAYLOR-U
    Baylor University Libraries | One Bear Place #97148 | Waco, TX 76798-7148 | 254.710.2112 | Contact: libraryquestions@baylor.edu
    If you find any errors in content, please contact librarywebmaster@baylor.edu
    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    TDL
    Theme by 
    Atmire NV