A few words first about muon catalyzed fusion.
"The muon may bump the electron from one of the hydrogen isotopes. The muon, 207 times more massive than the electron, effectively shields and reduces the electromagnetic repulsion between two nuclei and draws them much closer into a covalent bond than an electron can. Because the nuclei are so close, the strong nuclear force is able to kick in and bind both nuclei together. They fuse (through quantum tunneling ), release the catalytic muon (most of the time), and part of the original mass of both nuclei is released as energetic particles, as with any other type of nuclear fusion. The release of the catalytic muon is critical to continue the reactions."
It's important to note here that if the mass of the electron was 5-10 times larger, this process would work with electrons instead of muons.
A few words about relativistic channeling .
It is important to note here the relativistic mass increase of the relativistic electron inside the crystal lattice.
Question 1. Based on these facts, is it feasible to consider relativistic channeled electron catalyzed fusion, due to relativistic mass increase of the electron in the crystal lattice (basically the heavy relativistic electron playing the role of the muon in the process described above)?
Question 2. Same question if you channel both deuterons and electrons through the crystal lattice.
If correct , that means that a Hydrogen saturated Palladium rod exposed to a beam of electrons ( or expose the Palladium rod to both beams of deuterons and electrons) in the right direction (probably close to axial or planar channeling) could lead to positive results. The geometry is important here, thus explaining the low rate of successful reproduction of the cold fusion experiments of Pons and Fleischmann (and I don't know if anybody tried this exact experiment ).