Enhancement of Nuclear Reactions due to Screening Effects of Core Electrons

Details Enhancement of Nuclear Reactions due to Screening Effects of Core Electrons Enhancement of Nuclear Reactions due to Screening Effects of Core Electrons

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cmns.conf..687l&link_type=abstract

CONDENSED MATTER NUCLEAR SCIENCE. Proceedings of the 10th International Conference on Cold Fusion. Held 24-29 August 2003 in Roy

Physics

Condensed Matter

Scientific paper

Recent progress in understanding the screening effects of core level atomic electrons is summarized in this paper. Some preliminary results on core electron screening were reported before.1 The studies focus on two types of nuclear reactions in some metal lattices: fusion between deuterons and also proton capture by medium and heavy lattice nuclei. In both reactions the energy of the light nuclear species, proton or deuteron, is on the keV (1000 eV) scale, while that of heavy nuclei is essentially zero. A standard atomic code is used to obtain the core electron charge density and the potential profile in the metal atom. This Hartree-Fock-Slater type code was originally written by Herman and Skillman2 and later modified by others and available online.3 For the D-D reaction, the charge density obtained then gives an estimate on the screening length. The corresponding enhancement in Coulomb barrier tunneling can be obtained from this data. For the proton capture reaction, an ion dynamic code4 written to simulate the motion of keV protons in Pd/Ni lattice, CLAIRE, was modified to take into account the realistic atomic potential, including core electron contributions. In both cases, our result shows a significant nuclear reaction enhancement. The reaction rate calculated roughly matches the scale of excess heat observed in some metal hydride/deuteride5 experiments.

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