Title page for etd-0719100-174726


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URN etd-0719100-174726
Author Cheng-Ying Tseng
Author's Email Address m8723616@student.nsysu.edu.tw
Statistics This thesis had been viewed 5574 times. Download 1794 times.
Department Physics
Year 1999
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The Study of Absorption and Fluorescence Spectra of Nitric Oxide with Synchrotron Radiation
Date of Defense 2000-07-10
Page Count 65
Keyword
  • van der Waals well depth
  • collisional quench
  • fluorescence cross section
  • absorption cross section
  • Abstract In the absorption spectra, photoabsorption cross sections and oscillator strengths were measured. Quantum defects were calculated to identify the assignments of absorption features. The measured quantities were also compared with previous results. In fluorescence excitation spectra, ultraviolet and visible emissions were observed, and fluorescence cross sections were measured in the excitation region between 140 and 170 nm. The ultraviolet emission is due to the transition B’2Δ→X2Π and the visible emission is associated with B’2Δ→B2Π and E2Σ+→A2Σ+ transitions. In the presence of foreign gas, the collisional quenching effect plays an important role on the fluorescence intensity of C(0) and D(0).We measure the quenching half pressure P1/2 of D(0) respectively. The potential well depth of van der Walls molecule NO-M can be derived from the measured quenching half pressure. In contrast to quenching, the fluorescence intensity of C(1), B(9), B(10) and B(11) are enhanced as the pressure of foreign gas is increased. The enchancement of the fluorescence intensity is attributed to the collisional removal of predissociation.
    Advisory Committee
  • dong-Po Wang - chair
  • Ja-Ba Nee - co-chair
  • Chie-Tong Kuo - advisor
  • Files
  • 論文.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2000-07-19

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