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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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