Results of numerical simulations of fusion rate d(d,p)t, for low-energy
deuteron beam, colliding with deuterated metallic matrix (Raiola et al. Phys.
Lett.B 547 (2002) 193 and Eur. Phys J. A 13 (2002) 377) confirm analytical
estimate given in Coraddu et al. nucl-th/0401043, taking into account quantum
tails in the momentum distribution function of target particles, and predict an
enhanced astrophysical factor in the 1 keV region in qualitative agreement with
experiments.Comment: 6 pages, without figure