High resolution incoherent quasielastic neutron scattering study of molecular reorientations of trimethylacetic acid (CH3) 3CCOOD in its low-temperature phase

Using the incoherent quasielastic neutron scattering technique, we have studied the molecular reorientations of partially deuterated trimethylacetic acid (CH3)3CCOOD in its low temperature phase. The measurements were carried out with a sample temperature in the range from 80 K to 254 K, using an incoming neutron wavelength λ = 6.28 A. The observed quasielastic spectra are consistent with a model allowing a combination of 120°-reorientations of the methyl and t-butyl groups.