Temperature dependence of collective excitations in liquid deuterium studied by neutron inelastic scattering

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Abstract
The inelastic response from liquid deuterium has been measured on a thermal three-axis neutron spectrometer at two different temperatures. The observed neutron scattering spectra show clear inelastic features which have been analysed using a damped harmonic oscillator (DHO) model. The momentum transfer dependences of the DHO frequencies and damping coefficients at each temperature are compared and related to the results of the correlated density matrix formalism.