1. Institut Max von Laue-Paul Lagevin, 156X, F-38042, Genoble Cedex, France 2. Institut für Festk?rperforschung, Kernforschungsanlage Jülich GmbH, Postfach 1913, D-5170, Jülich 1, Federal Republic of Germany
Abstract:
High resolution inelastic neutron scattering experiments on tunnelling molecules in CH4 II and NH4+ ions in (NH4)2PdCl6 performed at high momentum transferQ are reported. TheQ dependence of the inelastic structure factors of the tunnelling transitions extracted from the results is compared with theoretical predictions.