Browsing Theses and Dissertations by Author "Bai, Jianmei"
Collisional Molecular Orientation Transfer Facilitated Polarization Spectra of the A/b States of the Rb2 and Cs2 DimersLyyra, A. Marjatta; Burkhardt, T. W. (Theodore W.), 1940-; Matsika, Spiridoula; Riseborough, Peter; Wunder, Stephanie L. (Temple University. Libraries, 2011)The focus of this thesis is the study of the strongly perturbed A/B complex of electronic states of the Rb2 and Cs2 dimers. Using collisional molecular orientation transfer facilitated high resolution V- type optical-optical double-resonance (OODR) polarization spectroscopy, it was possible to observe a much larger number of rovibrational levels in the A/B complex of states than anticipated. In addition to the direct P, R doublets, we have observed probe laser signals from a large number of collisionally populated rotational levels. Angular momentum changes up to delta J = 58 were observed in the recorded 85 Rb2 spectra. Observation of these satellite lines is based on transfer of both population and orientation from the rovibrational levels involved in the pump laser excitation to neighboring levels in a collision of the molecule with atomic perturbers. The Discrete variable representation (DVR) method was used to analyze this data combined with other available data in a global deperturbation analysis of the spin-orbit interaction of the strongly perturbed A/B complex of Rb2 and Cs2 electronic states. The resulting experimentally derived potential energy curves and internuclear distance dependent spin-orbit functions are presented in H. Salami et al., Phys. Rev. A80, 022515 (2009) and Jianmei Bai et al., Phys. Rev. A83, 032514 (2011). In addition, the analysis yields the term values of the rovibrational energy levels and their percentage of singlet and triplet character.