Abstract
The interaction of subatmospheric (900 mbar) D2 or H2 with Pd sheet samples has been investigated isochorically, while the temperature was slowly decreasing from 900 to 20 °C. As predicted, maximum gas absorption has been observed below 100 °C, however the average D/Pd and H/Pd atomic ratios here achieved, 0.8–0.9, exceed literature provisions; furthermore anomalous metastable absorption (D/Pd ≅ 0.35) was tested in the range 500–200 °C. CR-39 charged-particle detectors after exposure to D-loaded sheets always revealed large number of tracks, whereas no emission was monitored from H-loaded samples: if the tracks have been due to D-D fusion fragments, the estimated average fusion rate is about 10−19 fusionper couple of deuteronsper second. Significant neutron count increase over background matching with D absorption was systematically observed, which fits with an average fusion rate ≅ 10−21 fusionper couple of deuteronsper second; such datum however is made intriguing by a similar n-excess measured during H absorption.
Published Version
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