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常温高压下水的拉曼谱峰标定压力的研究 被引量:1

Research on Raman Spectra of Water as a Pressure Gauge at High Pressure and Room Temperature
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摘要 利用金刚石压腔测定了26℃高压下水的O—H伸缩振动拉曼谱峰的变化,并对其进行分峰处理,初步确定了水的拉曼拟合峰ν3244的峰位置与体系压力的关系,且论证了利用水的拉曼拟合峰ν3244的变化标定金刚石压腔压力的优点以及应用上的局限性。实验结果表明:26℃时,在实验的压力范围内,由水的拉曼谱峰拟合得到的ν3244峰位置随着体系压力的增加呈线性减小。其关系式为p(MPa)=32 9(νp)3244+200 7(3215cm-1<ν3244<3244cm-1)。 This paper has discussed the reliability of the Raman spectra of water as a pressure gauge for the hydrothermal diamond anvil cell(HDAC) at pressures of 39~1 150 MPa and a temperature of 26 ℃.The results show a linear relation between pressure and the frequency of the fitted peak:p(MPa)=329(ν_p)_(3 244)+2007(3 215 cm^(-1)< ν_(3 244)<3 244 cm^(-1)).
作者 李敏 郑海飞
出处 《高压物理学报》 EI CAS CSCD 北大核心 2004年第4期374-378,共5页 Chinese Journal of High Pressure Physics
基金 国家自然科学基金项目(40173019 10299040) 北京大学地球与空间科学学院人才基金
关键词 拉曼 金刚石压腔 伸缩振动 拟合 线性 关系式 高压 MP 压力 处理 pressure gauge water Raman spectra ν_(3 244)
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