Could Halo Nucleons Affect Electron Capture in Nuclear Decay?

[Riemannliness]

Hypothetically, could the process of electron capture in any way be affected by the presence of halo nucleons? There is probably little relation if any, I don't even think that any nuclear of the known halo isotopes can undergo decay under k-capture.

 

[bcrowell]

There's a gap of many orders of magnitude between the distance scale of the nucleus (1 fm) and the distance scale of the K-shell electrons (.1 nm?). Beta decay is sensitive to nuclear structure, and is the kind of thing that can be calculated using the shell model, but I think it's basically sensitive to things like the overlap between the proton and neutron wavefunctions.