Resonant $ddμ$ Formation in Condensed Deuterium
英文摘要：
The rate of $ddμ$ muonic molecule resonant formation in $dμ$ atom collision with a condensed deuterium target is expressed in terms of a single-particle response function. In particular, $ddμ$ formation in solid deuterium at low pressures is considered. Numerical calculations of the rate in the case of fcc polycrystalline deuterium at 3 K have been performed using the isotropic Debye model of solid. It is shown that the energy-dependent $ddμ$ formation rates in the solid differ strongly from those obtained for D$_2$ gaseous targets, even at high $dμ$ kinetic energies. Monte Carlo neutron spectra from $dd$ fusion in $ddμ$ molecules have been obtained for solid targets with different concentrations of ortho-D$_2$ and para-D$_2$. The neutron time spectra calculated for pure ortho-D$_2$ and para-D$_2$ targets are very similar.
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