INTERNAL FRICTION STUDY OF THE HIGH TEMPERATURE DISLOCATION MOBILITY IN Si SINGLE CRYSTALS P. GADAUD, J. WOIRGARD, P. MAZOT, J.L. DEMENET et J. de FOUQUET J. Phys. Colloques, 48 C8 (1987) C8-101-C8-106 DOI: 10.1051/jphyscol:1987811