Abstract
Intense directional X-ray emission was observed from metal targets (Pd and Ti), which served as the cathodes in a pulsed high current (100-400 mA) and low voltage (1.0 - 2.0 keV) deuterium/hydrogen glow charge. X-ray measurements showed an intense (I<sub>x</sub> = 10<sup>13</sup>-10<sup>14</sup> s<sup>-1</sup>-cm<sup>-2</sup>) soft X-ray emission (with a mean energy of quantum E<sub>x</sub> = 1.2-1.5 keV) directly from the Pd or Ti cathode. The X-ray yield is strongly dependent on a deuterium diffusivity in the surface layer of the cathode. The X-ray emission can be associated with enhanced electron screening effects at metal surfaces and interfaces and a coherent oscillation of this screening layer.
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