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Observation of Excited υs(NO2) and Relaxation Process of HNS in Solution by CARS Technique
Gen-bai Chu1, Min Shui1, Yun-fei Song2, Tao Xu*3, Yu-qiu Gu*1, Yan-qiang Yang2
1.Science and technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;2.Department of Physics, Harbin Institute of Technology, Harbin 150001, China;3.Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
Abstract:
Investigation on vibrational excitation and relaxation process will provide important in-formation for a better understanding of ultrafast dynamic response of energetic materials. Using sub-ps time-resolved coherent anti-Stokes Raman scattering (CARS) experiments, we directly observe excitation of vibrational mode νs(NO2) and its relaxation process of ground state HNS (2,2',4,4',6,6'-hexanitrostillbenein) in solution. The results show that νs(NO2) at 1385 cm-1 has been excited and relaxation time of 0.38 and 8.5 ps is obtained. The possible quantum beat frequencies are also discussed via fs-CARS experiments. The original results provide an insight into ultrafast process of energetic materials.
Key words:  2,2',4,4',6,6'-Hexanitrostillbene, Vibrational mode, Coherent anti-Stokes Ra-man scattering
FundProject:
六硝基菧溶液的νs(NO2)激发及弛豫过程的相干反斯托克斯拉曼光谱
储根柏1, 税敏1, 宋云飞2, 徐涛*3, 谷渝秋*1, 杨延强2
1.中国工程物理研究院激光聚变研究中心高能量密度物理研究部,绵阳 621900;2.哈尔滨工业大学物理系,哈尔滨 150001;3.中国工程物理研究院化工材料研究所,绵阳 621900
摘要:
研究含能材料的振动激发和弛豫过程能深入理解含能材料的超快动态响应过程. 利用亚皮秒分辨的相干反斯托克斯拉曼(CARS)技术,实验直接观察基态的六硝基菧溶液中νs(NO2)激发峰位于1385 cm-1,弛豫时间为0.38和8.5 ps. 飞秒CARS实验观察到相应的拍频现象.
关键词:  六硝基菧,硝基伸缩振动,相干反斯托克斯拉曼
DOI:10.1063/1674-0068/28/cjcp1409153
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