Deuterium flux through the thin wall of a palladium tube has been studied by monitoring gas pressure and temperature. A high-precision calorimeter (Calvet) was used to detect heat flow when the heater was shut down and the palladium tube was cooling down slowly. At certain temperatures an abnormal deuterium flux appeared. This deuterium flux reached a peak when the temperature of the palladium was decreasing. This abnormal deuterium flux differs from the monotonic feature of a normal diffusive flux and is accompanied by a heat flow.

Summary. −An energy releasing state in the D/Pd systems has been identified with a life-time of 104 seconds. It is shown that this life-time is the characteristics of the resonance tunneling of the Coulomb barrier via lattice confined deuterons. It opens a new approach towards fusion energy with no strong nuclear radiation.