Molecular spectroscopy notes for BSc & MSc

UNIT-II: MOLECULAR SPECTROSCOPY

The theoretical treatment of rotation, (rigid and non-rigid rotator models), linear poly-atomic molecules. Determination of bond lengths. Isotopic effect on rotation spectra. Vibrational spectra of diatomic molecules, linear harmonic oscillator model. The anharmonic vibrations, Morse potential and potential energy surfaces, fundamental vibration-frequencies, overtones and hot bands, degree of freedom of polyatomic molecules. Vibration-rotation spectra of diatomic and linear polyatomic molecules, PQR branches. notes for BSc & MSc