J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-923 - C6-925|
J. Phys. Colloques 42 (1981) C6-923-C6-925
DETECTION OF IMPURITY TUNNELING IN SOLIDS VIA COHERENT PHONON COUPLING AND DIRECT NEUTRON SCATTERINGR.C. Casella
National Measurement Laboratory, National Bureau of Standards, Washington, D.C. 20234, U.S.A.
A theoretical treatment is given of the observation of molecular tunneling in solids by the coherent interaction of the tunnel-split excitations with acoustic phonons and by direct neutron inelastic scattering. Results are applied to the case of rotation tunneling of CN- dumbbells in KBr and KB1 and to the motion of H atoms in two-well traps associated with oxygen impurities in niobium. Comparison is made with experiment.