When chopped light impinges on a solid in an enclosed cell, an acoustic signal is produced within the cell. This effect is the basis of a new spectroscopic technique for the study of solid and semisolid matter. A quantitative derivation is presented for the acoustic signal in a photoacoustic cell in terms of the optical. thermal, and geometric parameters of the system. The theory predicts the dependence of the signal on the absorption coefficient of the solid, thereby giving a theoretical foundation for the technique of photoacoustic spectroscopy. In particular, the theory accounts for the experimental observation that with this technique optical absorption spectra can be obtained for materials that are optically opaque.
提供商 |
北京東方德菲儀器有限公司 | 下載次數(shù) |
93次 |
資料大小 |
1MB | 資料類型 |
PDF 文件 |
資料圖片 |
-- | 瀏覽次數(shù) |
786次 |
20
立即詢價
您提交后，專屬客服將第一時間為您服務