Deep-UV standoff Raman spectroscopy 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
Next-Generation Spectroscopic Technologies XII: SPIE Defense + Commercial Sensing Conference, 15–17 April 2019, Baltimore, Maryland, United States
出版年
2019
页码
109830H.1-109830H.8
会议地点
Baltimore
作者单位
Department of Chemistry and Biochemistry University of Maryland Baltimore County 1000 Hilltop Circle Baltimore, MD. 21250Department of Chemistry and Biochemistry University of Maryland Baltimore County 1000 Hilltop Circle Baltimore, MD. 21250Department of Chemistry and Biochemistry University of Maryland Baltimore County 1000 Hilltop Circle Baltimore, MD. 21250
作者
Bradley R. Arnold;Eric Bowman;Leslie Scheurer
摘要
The availability of high peak-power laser systems capable of delivering intense deep-UV pulses has brought renewed interest in using Raman spectroscopy as both a selective and sensitive analytical technique for stand-off detection. Our approach uses a high power pulsed-laser as the excitation source, specifically the fourth and fifth harmonics of a Nd:YAG laser. One of the hurdles to be overcome to allow deep-UV Raman spectroscopy to become accessible is a direct method of calibrating both the observation frequency and detector response of the spectrograph being used. This report outlines our efforts to understand the photochemical and photophysical consequences of high-peak power excitation of cyclohexane for potential use as a secondary Raman standard in the deep-UV. Evaluation of the photochemical stability, both from multi-photon absorption and in the presence or absence of dissolved oxygen as well as the possibility of (near) resonance enhancement of the C-H stretching region will be described.
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