Molecular librations in a liquid investigated by ultrafast optical Kerr   effect spectroscopy
  We propose a detail theoretical approach modeling molecular librations in liquid investigated by ultrafast optically heterodyne detected optical Kerr effect (OHD-OKE). The approach has been applied for fluoroform molecular liquid and new information about spectrum, relaxation time and time domain librations has been obtained. 
V.G.Nikiforov and S.A.Moiseev