Europhys. Lett.
Volume 68, Number 3, November 2004
Page(s) 363 - 369
Section Nuclear physics
Published online 16 October 2004
Europhys. Lett., 68 (3), pp. 363-369 (2004)
DOI: 10.1209/epl/i2004-10209-3

The $\chem{{}^{2}H(d,p){}^{3}H}$ reaction in metallic media at very low energies

K. Czerski1, 2, A. Huke1, P. Heide1 and G. Ruprecht1

1  Hahn-Meitner-Institut, Bereich Strukturforschung Glienicker Str. 100, 14109 Berlin, Germany
2  Technische Universität Berlin, Institut für Atomare Physik und Fachdidaktik Hardenbergstr. 36, 10623 Berlin, Germany

received 5 January 2004; accepted in final form 31 August 2004
published online 16 October 2004

Based on our experimental studies of the electron screening effect in the $\chem{{}^{2}H(d,p){}^{3}H}$ reaction for five deuteron-implanted solid targets ( $\chem{C,Al,Zr,Pd,Ta}$), theoretical calculations have been performed within an improved dielectric function theory. The theory describes correctly the observed target material dependence of the screening energies, underestimating, however, the absolute values by about a factor of 2. Applying an effective screening energy approach, the theoretical cross-sections, thick-target yields as well as nuclear reaction rates have been calculated down to the energies corresponding to the conditions of so-called cold-fusion experiments. This allows for a comparison of the experimental results at higher energies with those achieved in the heavy-water electrolysis experiments.

25.45.Hi - Transfer reactions.
95.30.Dr - Atomic processes and interactions.
95.30.-k - Fundamental aspects of astrophysics.

© EDP Sciences 2004