Raman Spectrum Analysis is pronounced as /ˈrɑːmən ˈspɛktrəm əˈnæləsɪs/. The pronunciation reflects the origin of the word, which was named after Indian physicist C. V. Raman, who discovered the Raman effect in 1928. The word "Raman" is pronounced with stress on the first syllable, which is a long "aa" sound in IPA (/_rɑː_/). In the word "spectrum," the stress falls on the second syllable, which is an unstressed "ɛ" sound in IPA (/spɛktrəm/). The word "analysis" is pronounced with stress on the second syllable, which is a short "æ" sound in IPA (/əˈnæləsɪs/).
Raman spectrum analysis is a technique used in spectroscopy to investigate the vibrational modes of a molecule or solid material. It is named after the Indian physicist Sir C. V. Raman, who discovered the Raman effect in 1928. This effect occurs when a sample is irradiated with monochromatic light, leading to the scattering of light at different frequencies than the incident light. The frequency difference between the incident and scattered light is called the Raman shift.
The Raman spectrum analysis involves the measurement and analysis of the Raman scattered light. The scattered light contains information about the vibrational and rotational energy states of the molecules in the sample. By analyzing this scattered light, researchers can identify the chemical composition, molecular structure, and bonding characteristics of the sample.
The Raman spectrum is typically acquired by focusing a laser beam onto the sample and collecting the scattered light using a spectrometer. The resulting spectrum is a plot of intensity (y-axis) against Raman shift (x-axis). Peaks in the spectrum correspond to different vibrational or rotational modes of the sample.
Raman spectrum analysis finds applications in various fields such as materials science, pharmaceuticals, environmental monitoring, forensic analysis, and biomedical research. It is a non-destructive and versatile technique that provides valuable insights into the chemical and physical properties of materials.