THE HAT MODEL (HM)

The following sections are included:

• The Law of Motion

• The Steady-State Distribution W = C exp(−h)

• Fourier Amplitudes of Librating Molecules

• The Spectral Function of Librators

• The Spectral Function of Free Rotating Molecules

• The Effect of the Potential Well Steepness on Loss / Absorption Spectra

• Statistical Parameters

• The Curved-Brim Hat Model