- 作者: 邱紀良 ; 張華
- 作者服務機構: 清華大學化學系
- 中文摘要: Fluorescence from S/sub 2/Cl induced by radiation at 488nm was observed when the parent molecule S/sub 2/ Cl/sub 2/ was heated. The dependence of the intensity of fluorescence is third order on laser power. The mechanism of excitation is proposed to be dissociation of hot S/sub 2/ Cl/sub 2/ after two-photon absorption to yield hot S/sub 2/ Cl and one-photon absorption of the latter to reach the fluorescing states. The fluorescence spectrum consists of two systems, called .alpha. and .beta. here. The lower state of the .alpha. system is the ground state X.wiggle. and that of the .beta. system is assumed to be the A.wiggle. state. The upper states of both systems are unknown but may be related to previously observed states lying about 460nm and 330nm. The vibrational structure of the .beta. system was partially analyzed. The vibrational quantum numbers of the v/sub 2/ and the v/sub 3/ modes in the upper state are assessed to be .gtoreq.6 and 0, respectively, from a count of the number of nodes of the curves of the fluorescence intensity distribution. From the abrupt termination of the intensity curve of v/sub 2/" progressions, the absolute v/sub 2/" quantum numbers were determined. The excitation was in this way assigned to be (p, q+6,0)'.arrl.(m,4,n+3)", in which p, q, m and n are non-negative integers.
- 英文摘要: --
- 中文關鍵字: Fluorescence; Disulfur Chloride; Excitation Mechanism; Photon Absorption; Vibrational Structure; Vibrational Quantum Number
- 英文關鍵字: 螢光;二硫一氯;激發反應機構;光子吸收;振動結構;振動量子數