In search for the cold fusion reaction in titanium metal, ion implantation was used as a means to reach the required high deuterium concentration in the metal lattice. The beam current, acceleration energy, and cooling of Ti-metal were changed for the production of the transient states in target.
In the present investigation, 5keV to 15keV deuterium ions with 15mm beam size were injected into 1mm thickness titanium at liquid nitrogen temperature or room temperature. During the implantation, the temperature of the target was measured by J-type thermocouple. And the fast neutron from D(d, $He^3$)n reaction were monitored by using the NE-213 proton recoil liquid scintillation detector calibrated by use of PSD method.
The temperature increase or burst was not observed with the various implantation parameter. The detected neutron count rates were dominated by reactions of the incident energetic deuterons with the already implanted deuterons. The D-D reaction cross section, at liquid nitrogen, was lower than that obtained by extrapolation of Gamow function to low energy. This indicates that under extreme conditions of non-equilibrium the cold fusion reaction was not occurred.
The deuterium distributions were obtained by SIMS analysis. The investigated amounts of deuterium in the titanium target was proportional to the implanted deuterium fluence. The significant amounts of deuterium present in the depth of 0.3μm. The maximum path length from SIMS analysis is consistent with the calculated maximum path length. The equivalent length is about 0.2μm.
The deuteride in titanium specimen implanted by high fluence of deuterium was observed by optical microscope. The deuteride is the shape of acicular type.