Applet Launcher Applet 1 Applet 2 Applet 3 Applet 4 Applet 5 Applet 6   Rotational Raman Spectroscopy Interpreting the Spectrum page 1 of 2     Practical Navigator Introduction The Raman Effect Experimental Techniques 1. Rotational Raman Spectroscopy Interpreting the Spectrum Effect of Bond Length Centrifugal Distortion Intensities of Spectral Lines Nuclear Spin Statistics 2. Real Diatomic Molecules Temperature Spectrum of Nitrogen Isotopic Substitution Nuclear Spin Statistics Predict the Spectrum of Oxygen   The first applet uses the Rigid Rotor model to simulate the Rotational Raman Spectrum of an hypothetical molecule, , excited with a 333nm laser. The molecule has the following initial properties: Atom   Mass 1u Nuclear Spin 1/2 Bond Length 100pm Centrifugal Distortion Constant, D zero For Part one answer all questions using the Rigid Rotor Model. Lines are labelled by the J value of the level from which the transition takes place. The first Stokes line is a transition from the rotational ground state, Stokes(0). The first Anti-Stokes line takes place from the energy level with J = 2 to the ground state, Anti-Stokes(2).     << previous page www.physchem.ox.ac.uk next page >>