- 作者: 張明郎 ; 黃瑞禎 ; 林金全
- 作者服務機構: 台灣大學化學系
- 中文摘要: Radiative lifetimes adn total deactivation cross sections of K(7/sup 2/S) and K(5/sup 2/D) by collision with NO are studied. The K atomic vapor in either the 7/sup 2/S or the 5/sup 2/D state was prepared by two-photon absorption using a dye laser. The decay signal of the time-resolved fluorescence from the 7/sup 2/S-4/sup 2/P/sub (1/2)/ or 5/sup 2/D-4/sup 2/P/sub (3/2)/ transition was then monitored. Based on a Stern-Volmer analysis, the radiative lifetimes are 155.plmin.8 ns and 561.plmin.18 ns for the K(7/sup 2/S) and K(5/sup 2/D) states, respectively. The total deactivation cross sections are 88.plmin.1.ANG./sup 2/ and 70.plmin.2.ANG./sup 2/ for the K(7/sup 2/S)-NO and K(5/sup 2/D)-NO collisions, respectively. In the absence of NO collisions the radiative lifetimes obtained in this work show excellent agreement with those previously reported. The quenching cross sections for NO have been measured for the first time, and have values in a reasonable range, when compared with Na- N/sub 2/ collisions.
- 英文摘要: --
- 中文關鍵字: Deactivation; Cross Section; Radiative Lifetime; Fluorescence; Stern-Volmer Analysis
- 英文關鍵字: 鈍化;橫截面;放射生命期;螢光;史坦-佛曼分析