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Experiments using high-efficiency neutron detectors have detected neutron emission from various forms of Pd and Ti metal in pressurized D2 gas cells and D2O electrolysis cells. Four independent neutron detectors based on3He gas tubes were used. Both random neutrons (0.05–0.2 n/s) and time-correlated neutron bursts (10–280 n) of =100-µs duration were measured using time-correlation counting techniques. The majority of the neutron burst events occurred at ~ -30°C as the samples were warming up from the liquid nitrogen temperature.