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Infrared absorption and Raman scattering. Energy units for optical spectroscopy. k ? wave vector; 1/? = wavenumber. 1/? ? energy. 1 eV = 8067.5 cm-1300 cm-1 = 37.2 meV. Conservation rules for a Raman process. BACKSCATTERING. . . qphonon. KS. KL. . (cm-1). 300. Phonons in crystals. . . Raman-active.
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