Clarification

I was a little confused in my previous entry. I realized that I'm actually referring to electron capture when I say "reverse beta decay." Like all radioactive decay, it generally happens in unstable atoms. An electron from the K-shell is "sucked" into the nucleus where it combines with a proton to form a neutron and emits an electron neutrino. So now my question is, could this effect be replicated by colliding two particles in a particle accelerator?