Raman scattering from the CO2 molecule occurs on the symmetric stretch mode (see Fig. 23-22), which...

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Raman scattering from the CO2 molecule occurs on the symmetricstretch mode (see Fig. 23-22), which vibrates at 40 THz. If theusual isotope of oxygen (8 protons, 8 neutrons) is replaced by onewith 8 protons and 10 neutrons (18O), the mass that governs thevibrational frequency in Eq. (5-8) will be increased by the factor18/16. (a) Determine the molecular vibrational frequency for CO2with the 18O isotope. (b) If the incident light has wavelength 800nm, calculate the wavelength of Raman-scattered light for both the16O and 18O isotopes.

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