Observations of Strong Resistivity Reduction in a Palladium Thin Long Wire Using Ultra—High Frequency Pulsed Electrolysis at D/Pd>1*

We performed a ultra—short width high voltage pulse electrolysis using a thin Pd wire cathode; a diluted electrolytic solution of D2O+LiOD was used in a peculiar wire—turned electrodes geometry. The deuterated Pd loading was evaluated by the D/Pd normalised electric resistance curve (R/Ro). After a long time of electrolysis a very high D/Pd loading (1:1 or more) was reached. Very low R/Ro (< 0.1) Pd wire was measured after switching off the electrolysis and this effect lasted for several minutes. The Deuterium deloading occurred in several typologies (fast and slow terms) showed as a resistance transition on the Pd wire. This effect can be related to a peculiar surface structural condition. To be published on "Fus.Thec." Presented at the "ICCF-6", Sapporo, Japan, October 13-18, 1996 * Work supported by: INFN, ORIM (Italy); NEDO—NHE (Japan) Palladium wires fabricated by: ORIM