Deuterated palladium at temperatures from 4.3 to 400 K and pressures to 105 kbar: Search for cold fusion

We have studied a sample of deuterated palladium at pressures up to 105 kbar and temperatures from 4.3 to 400 K in an effort to detect cold fusion. A [D]/[Pd] concentration of 1.34±0.1 was achieved. No evidence of cold fusion was found with a limit of 2.5×${10}^{\mathrm{-}18}$ fusions (DD pair${)}^{\mathrm{-}1}$ ${\mathrm{s}}^{\mathrm{-}1}$ from neutron detection and 1.5×${10}^{\mathrm{-}8}$ fusions (DD pair${)}^{\mathrm{-}1}$ ${\mathrm{s}}^{\mathrm{-}1}$ from detection of possible heating; a γ-ray detector showed no evidence of γ rays differing from background.